Installing the replacement coil was simple. Suspecting coil trouble I am trying to measure the primary and secondary resistances on the ignition coils in my 02 Scenic, which has now had all four coils replaced in the last year. This testing procedure is valid for most automotive coils. On the omega is it right at the back of the engine, a real pig to get into. Owner's service manual. Yes the multi-meter test gives a good indication of whether the coil is working or not but it is not 100% accurate. Assuming a spark is now being generated, place the cover back over the engine. then if the plug is good you wil need a digital ohm meter to test the coil pack. Coil-on-plug (4-wire) - trigger and feedback - voltage The purpose of this test is to examine the individual signals in a 4-wire COP unit to identify the signals and verify correct operation. The secondary resistance from one push-on terminal to the hi-tension terminal is about 10,000 ohms. It's not a bad idea to take your ohmmeter or multimeter and check the continuity on these coils while you're in here. If the coils are fine, check the primary circuit for proper voltage. Check the ignition coil and the fuel injector (link below). 7 and reading the other way your meter should read a far higher number. if you need to know how to remove the coil pack let me know, to test put on ohms should not have more than 2 1/2 ohms restance betweent coil lead to coil connector. The burner assembly consists essentially of a gas valve, ignitor and a flame sensor. When the current is broken, the magentic field callapses. Your "Can coil packs still be bad even if they test good on ohmeter" post was dead on! Same scenario here in north Texas. Built for power, style and performance, your Chevy Silverado 1500 is one hip pick-up truck that easily puts all others to shame. That's why the magneto tech manuals from Fairbanks Morse, Slick, Wico, etc. The issue with this vape style is that these coils burn out and need to be replaced periodically, which costs upwards of $20. Adding all those together, we have developed an electrical circuit to get the car started and charge the battery, but now we need a. Frequency Meter / Counter measures frequency from 10Hz to 60MHz with 10Hz resolution. 450+ RadioShack locations across America and more on. To check the coil operation remove the high voltage coil lead from the disty and place it within a half inch of ground. Requires iOS 6 or later. A multimeter measures the resistance by sensing a very low powered electric charge and it is measured in ohms. Re read my reply on how to tell what cylinder and coil is involved. In your case if you have a new plug and have the kill switch disconnected it would be likely that your coil is the faulty component as there is nothing else. The voltage you're seeing on the distributor side of the coil when it's running is actually an 'average' (or as close as a common hand-held meter can read) voltage. There IS elec. How to Test a Jeep Coil Pack by Dustin Thornton Some vehicle ignition systems use coil packs to convert the power from the 12-volt battery in your car to the necessary 35,000 volts required to fire spark plugs instead of a distributor and rotor assembly. An ignition coil is a kind of high-voltage transformer. Set your ohmmeter to the 10 ohms range, and touch the terminal B+ (usually the center prong on the coil pack electrical connector) with one of the meter test leads, and touch the corresponding coil prong on the electrical connector with the other test lead. If it does, then the coil pack itself has failed. This article is a general overview of the COP Coil tests. It controls the ignition spark that is sent to each of your vehicle's cylinders to get them pumping and get your vehicle moving. How to Check Coil Packs With a Voltage Meter | It Still Runs. How to Test Ford Coil Packs. 0 Ω; Actual value: 0. 3L has a misfire on cylinder 2, i changed all plugs and plug wires, tested all and 2 is no spark. Coil pack testing. ohm meter test for coil packs S-Series Tech ok so what readings and where do i want to go with mr ohmeter to test my coil packs? thanks briansc1. Page 1 of 4: How to Test the Ignition Coils. Open circuit (infinite ohms) = bad pickup coil. S4 / RS4 (B5 Platform) Discussion - Coil pack - Can someone explain to me how to test a coil pack with a MULTIMETER? Nothing more Thanks! Eric Btw I don't want to know how to switch, swap, replace coil packs. How do I test an ignition coil without a multimeter? 29 points Recommended car throttle shop Worldwide Shipping In The CT Shop Car Throttle Submit Your Videos To Get Featured On. HOW TO TEST HONDA CB550 IGNITION COILS: Unscrew the spark plugs boots from the coils high tension lead wires. Likes Received: 3,097. You can check the resistance with a multi meter that allows you to test ohms or a dedicate ohms meter. Primary winding: disconnect each coil pack's connector and touch the multimeter's 2 terminals on the 2 pins of a coilpack, and make a note of the reading you get on the digital display. To test the operation of both the ignition coil and the spark plug, connect the tester between the spark plug boot and the spark plug. The primary resistance is measured from the two contacts where the coil contacts the DFI module. Then switch to the other clutch coil terminal and check for short to ground. This testing procedure is valid for most automotive coils. Start by checking the resistance between the coil's side terminals. They can break very easily if the bolts have not been removed in a long time, so be careful. Before you begin our guide, you will need to remove the 3. Wires resistance was within specs as per the service manual. Using an inductive tachometer, check the RPM on all cylinders. It certainly cannot HURT anything…and very well may cure the issue. The Testing Tips in this article apply only to coil pack type ignition coils like the ones pictured below. For your small engine ignition repair that requires Ignition Coils, think Jacks! We have most everything you could want when doing a small engine repair or maintenance. Essentially then, the current, changing with time in coil 1 sets up a magnetic field that links coil 2. " Touch each of the multimeter's leads to the ends of the orange wires, running from the power packs to the ignition coils -- touch the orange wires with the positive lead and touch the negative lead to the negative terminal (-) on the ignition coil. Regulated charging systems are designed to provide charge to the battery based on its need. 450+ RadioShack locations across America and more on. i'll go out again in a few minutes and try it again, just to make sure my ears weren't fooling me. You'll often find broken pickup coil leads this way. I was going for the "primary resistance" of the coil. 41K between the plug coil wire and connector pins I had a bad coil pack and it read the exact some ohms as the good ones. Replace the ignition coil on the cylinder dropping spark. With your ohm meter, measure the coil ground to the secondary (where the spark plug wire goes). 2006 VZ SSZ Crewman, how do you test the coil packs? Can you test them with a multimeter in anyway? Car was a bit "shakey" on idle, ran fine all the rest of the time. It has molded in metal that transfers spark from the coil to the plug boot (technically, the 2. Order today, ships today. An open coil reading zero is the usual culprit of coils. 02 ohms and for secondary it should be 9. Reprinted with permission from Lost Treasure Field Test By Joe Patrick From page 14 of the October 1998 issue of Lost Treasure magazine. Is there any way to test the indiviual coil packs on a 2000 Nissan Maxima. Don't know what an 80 should should read but 84 to 88 should read,primary coil 2. Water has been breathed in and has set up residence. umm if i read your post right you tried to test your coil output voltage with a multimeter? do you realize that the coil output is upwards of 35000+ volts the input to the coil is supposed to be between 11. This coil heats up (directly touching the CBD vape oil) to vaporize it. A late model Mustang’s distributor and plug wires are now merged into one piece, called a Coil on Plug (COP) and if you want a hotter spark, it’s about the only way to go. then you need resistance across the 2 primary terminals. Turn digital multimeter dial to resistance, or ohms, which often shares a spot on the dial with one or more other test/measurement modes (continuity, capacitance or diode; see illustration below). The Testing Tips in this article apply only to coil pack type ignition coils like the ones pictured below. When it comes to testing ignition coils, the first thing we all want to do is grab our multimeters to check the resistance. The ballast resistor isn't used during cranking (when the battery voltage is usually reduced to around 6-8 volts). Engines on Stihl trimmers, chainsaws, blowers, edgers and cultivators are two-cycle. 7 or over 4. The voltage usually ranges between 55 and 90 volts, with 65 volts being the norm. Ignition Coils. 99 camry coil pack testing with multimeter ?? 2 Answers I have 99 Camry 4 cyl. Remove the wire from the minus side of the coil. Take the ICM to an auto parts store for testing as there is no easy way for you to test it. Find Smok Nord coil packs at Vaporbeast. You will need a multimeter to test the resistance (ohms) across the coil pack. In your case if you have a new plug and have the kill switch disconnected it would be likely that your coil is the faulty component as there is nothing else. You can check all of the stores listed above when you’re trying to pick up vape supplies online, and make your decision based on who offers. Re: Testing ignition coil with multimeter After a bit of time, got today under the bonnet at removed ht leads and spark plugs. It still can be shorting across the winding with high voltages or shorting to ground internally with jumping the winding in use. hth Mykel. The primary resistance should be between 0. The SMOK Nord Replacement Pods have a 3ml capacity and includes Smok Nord coils in 1. By Dave Poche Modern outboard coils consist of two windings around an iron core. 2 and my tech book says for this car I should be getting. The multimeter can only test a live current, as it forms a temporary circuit with the object being tested and does not have an internal battery to avoid crosstalk in its own internal wiring that may corrupt the readings. Test & Measurement Products Pressure transducers, load cells, torque transducers, LVDTs, accelerometers, and instrumentation for test and measurement applications. At this time i didnt knoe of the 2 plug to a cylinder idea never heard of it. I'm in the process of purchasing another set of coil packs to try and diagnosis the problem. When testing your Harley Davidson ignition coil you will be testing ohms resistance. i allow around 250. 4 liter Nissan. Frequency Meter / Counter measures frequency from 10Hz to 60MHz with 10Hz resolution. Wak, whats that coil pack tester you posted up and where can you get one from? Ive got a 3. OUT = Out going Phase / live or Neutral to the home main distribution board. Disconnect the wiring harness from the ignition coil. How to test an ignition coil This testing procedure is valid for just about any automotive coil How to test a ford coil pack with a multimeter. 1 answer 1. What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. then if the plug is good you wil need a digital ohm meter to test the coil pack. Set your ohmmeter to the 10 ohms range, and touch the terminal B+ (usually the center prong on the coil pack electrical connector) with one of the meter test leads, and touch the corresponding coil prong on the electrical connector with the other test lead. So I'm asking where to probe the coil pack to check for resistance. Using a multimeter, you can test the ohm ratings of both primary and secondary outlets on the waste-spark coil, and all of those on this truck tested well (between 0. thanks scott for the info, I think you saved me from replacing the wrong part. Read More. 0 Ω; Actual value: 0. But I just stick dist in and if it does not go all of the way down hold down on edge of dist and just bump starter a little and it will drop on down. You can check all of the stores listed above when you’re trying to pick up vape supplies online, and make your decision based on who offers. CNP Coil Type. I was wondering if anyone can explain to me how to test a coil properly. Shop low prices on groceries to build your shopping list or order online. Buy Color Coated Aluminium Coils for Window Decoration, Find Details include Size,Weight,Model and Width about Color Coated Aluminium Coils for Window Decoration. In this video learn how to check resistance using a multimeter. Move the test lead from the negative post on the coil to the center terminal where the large wire was removed. I have an astra g coupe with a z18xe engine which developed a fault on a coil pack (cylinder no4 misfiring), so i went down to the local auto factors to buy a new coil pack (non original). 1 answer 1. Bill payment (cash, check, money order or cashier's check) Customer service; Self-Service Quick Pay Bill Payment kiosks that accept cash, check, or Visa/MasterCard payments are available at select offices. To see the specific COP Coil articles: How To Test The Ford Escape COP Coils (Troubleshooting A Misfire). Articles and resources for electrical inspection, pressure calibration, fluid systems and troubleshooting motors and drives. Nothing fancy, but it works for me. View Cart; Fluke 113 True-RMS AC/DC Utility Multimeter ($149. It is a 2000 land rover discovery II. 7500 and Pri. Requires iOS 6 or later. If you have the equipment, this is the test to try out. Tuck the spark plug wire (connected to the ignition coil) into the recess beneath the brake handle assembly (on top of the harness wires). I'd like to know if there is any electrical test I can do to check the coil pack is functioning as it should. Check the resistance between the secondary terminals. The source coil produces the power. Many manufacturers have ways to test the ignition primary circuit built into the PCM, and as a technician we do not see the actual circuitry or wiring. 5 One end unscrews to revel a small screwdriver Length of entire tool: 118. Use the multimeter to check the removed ignition coil. This coil pack is mounted to the top of your engine, and failure of these coils are relatively common. Turn digital multimeter dial to resistance, or ohms, which often shares a spot on the dial with one or more other test/measurement modes (continuity, capacitance or diode; see illustration below). Replace the ignition coil on the cylinder dropping spark. Unscrew the bolts that hold the coil in place and remove it. To really test the squarecan ignition coil, I recommend my secret sparkie tester. 6 Testing a coil pack - Dog Try testing all the coil packs with an ohm meter to see if one is faulty. The meter should read nearly 12 volts, or about 7 volts if the coil has a ballast resistor. The Coil Master 521 Plus Tab is a totally redesigned and multi-functional device continuing the heritage of former versions of the world famous tab line, in order to dry burn your coil, test the battery output and voltage, as well as checking each coils resistance value. The ignition coil or module for a two-stroke engine regulates the ignition power, and converts it to charging electricity for the battery system. If you get no spark, then the next step is to check for spark directly on the ignition coil pack tower. The spark plug ignition coil is bad trust me!!! I have a 2002 escape and I have had to replace ignition coils 1,2,3,4 and 5 over the last 3 years. Set the meter on the highest volt range. To see the specific COP Coil articles: How To Test The Ford Escape COP Coils (Troubleshooting A Misfire). Check out other useful car maintenance tips provided by Car From Japan experts here ! faulty coil pack symptoms how to diagnose a faulty coil pack how to diagnose faulty coil pack signs of a faulty coil pack. The Bosch coils above should have a primary winding with 3. Radios, Headphones, TV Antennas, Cables & Adapters, DIY Tools & Parts, Electronics Maker Kits. Connect the multimeter's red lead to the power pack terminal with the brown lead from the charge coil. I was going for the "primary resistance" of the coil. You'll often find broken pickup coil leads this way. Continuous Memory DTCs P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358, P0359 and P0360 indicate an ignition coil primary circuit malfunction has occurred in coils 1 through 10. Restrictions apply. is long time without running. The secondary resistance should be between 5 -7 kohms. 1 of them I KNEW was bad, 2 of them were good, and 6 that I had just purchased. 5 is still within the acceptable range, so this by itself doesn't necessarily indicate a problem. Please check out my other vids and subscribe. A diode blocks current from flowing in one direction, while allowing it to pass through when the polarity reverses. Sounds silly but that's the advice direct from the factory. OUT = Out going Phase / live or Neutral to the home main distribution board. To find this information, research your car's engine on the Internet or purchase a Chilton's or Haynes manual to find out what the mega ohms reading on the coil pack should be. I dun know the exact parameter to judge the good one or bad. In this video learn how to check resistance using a multimeter. Attach both leads of the meter to the coil-terminals with black to the negative terminal and red to the positive one. Using certain multimeter models, you can test to be sure that components — such as diodes, capacitors, and transistors — function properly. the primary resistance is measured between connector terminal 3 and each coil terminal and value is 0. Measure secondary resistance. The PDF in Post #14 (Coil test. RE: Any one show me how to test the ohms using a multimeter. As one of the most important components in the ignition process, you want to know for sure if the problems you have starting your car are due to the coil or to something else. If one does not arc it is bad or weak and needs to be replaced. When testing your Harley Davidson ignition coil you will be testing ohms resistance. In order for you to learn how to test a Honda Accord ignition coil, you will need a 10mm wrench or socket and a multimeter. For anyone who is interested, here are the directions from the Bentley (MKIV Golf, Jetta, GTI - pages 28a-13 and 28a-14) to test a VR6 (AFP) coilpack. It's not a bad idea to take your ohmmeter or multimeter and check the continuity on these coils while you're in here. There is no way to properly test without a coil tester that runs the coil under a load under high voltage. Solder the wire to the lug. You can also troubleshoot your. We are going to take a look at the leaders in COP technology for mod motors and then follow up with a Granatelli coil packs install on our supercharged 2011 Mustang project. Test for resistance by setting the multimeter to ohms and touching the two probes of the meter to the two pins in the electrical socket on the sensor. There are 4 pins on older coil packs and 3 pins on newer coil packs. I would think it's similar to the 3. there is no real way to test it completely with all of the big fancy test equipment. In this video learn how to check resistance using a multimeter. Hi ! there i new with this forum and i want ask a question on ignition coil testing with meter. Depending on the sophistication and calibration of your ohm meter. Use a fluke meter or multi meter and check the connector from the coil pack. Check the spark plug first. The impedance numbers may be different on the N54 coils but if you take all 6 maybe checking that they all fall close to each other (like doing a compression test) or if one of them deviates a lot from the others would tell the story of a bad coil(s) in a set of 6?. We are going to take a look at the leaders in COP technology for mod motors and then follow up with a Granatelli coil packs install on our supercharged 2011 Mustang project. When a vehicle frequently stalls, misses or won't start at all, an ignition coil may need to be replaced. Consult your repair manual or factory service manual (FSM) for all the test ratings. Last week, we showed you how to use a multimeter to measure voltage—or, more accurately, to verify that voltage is present—which is the most common reason you'd grab the meter and probe around in your car's wiring. DC motors draw power from deep cycle (DC) batteries. The manual states to check them with a multimeter but im unsure how to do this as the procedure is not explained. If this test shows no spark or a weak spark, troubles with the breaker points or coil inside the magneto are likely. Please check out my other vids and subscribe. Find the heater relay. Coil pack type Ignition Systems can be found in vehicles from Ford, Chrysler, General Motors (like Chevrolet, Buick, Oldsmobile, Pontiac, etc. I assure this works for other motors too. The trigger coil tells the black box when to trigger the spark. Thanks for watching!. Shop for Pipe Fittings at Ferguson. 1 of them I KNEW was bad, 2 of them were good, and 6 that I had just purchased. I am under the impression that 1 or more of my coils is faulty and needs to be replaced. Please check out my other vids and subscribe. An ignition system in a small engine produces and delivers the high-voltage spark that ignites the fuel-air mixture to cause the combustion. I have coil packs 1 on the exhaust side and one on the intake side. The COP would misfire under load. Step by step guide on how to test an automotive engine's ignition coil and trigger, this article pertains to most ignition coil systems. If resistance is infinite or 0 ohms, replace the sensor. Set your DVOM. The Aegis Legend is designed with a high-quality construction integrating 6 different materials to achieve optimized durability. This will test the 1-2 coil pack. It would be fine on idle. Or, ohm check each spark plug wire individually and one by one. (Strip a little of the high tension leads’ insulation if needed. Is there an easy Red Neck way to bench test an ignition module out of a leaf blower? I have some old ones laying around, and would like to find a good one, without re-assembling the blower to test each one. Wiggle the green & white leads as you test. The Cerberus’s Super Mesh coil maximizes vapor and flavor with its precise mesh core, which also decreases heat-up time and heats more consistently than standard coils. CNP Coil Type. then if the plug is good you wil need a digital ohm meter to test the coil pack. Connect the low amp clamp to PicoScope Channel A, select the 20 A scale and zero the clamp before attaching to the coil voltage supply terminal. The black box coordinates everything and tells the ignition coil when to fire the spark plug. Help Testing AEG Coilpack with Multimeter 07-10-2013 11:14 AM #1 I was wondering if some one could walk me through the process of testing a coil pack and provide me with the what the resistance should be reading. The QUALITY of the replacement parts is absolutely of concern and a valid question…If the new coil pack is made in CHINA…THis is basically Par for the course. Until now testing them has been very time consuming. I measured nine (9) coils. The multimeter reads the resistance of the primary coil. To check the secondary coil, check the ohms between the batt terminal and where the coil output wire plugs into. Step 2: Test the resistance. 4 ohms and secondary resistance should be 5. ©2006 Publications International, Ltd. then move that coil pack. To test the coil, make sure that you have a good battery first. repeat for all 4 coils. 2 Release, but don't fully remove, the two screws holding the AFM to the mounting bracket. Start with the basics for all systems: Need help with this process go HERE! Clean the filters and the coils. Then check the resistance between either side terminal and the center high tension terminal. Figured it would help other people on here and save some time and money since it is so easy. Rated 1 out of 5 by Anonymous from Difficult to use Unusable for me since not much different reading between good and bad coil packs. The impedance numbers may be different on the N54 coils but if you take all 6 maybe checking that they all fall close to each other (like doing a compression test) or if one of them deviates a lot from the others would tell the story of a bad coil(s) in a set of 6?. 99 camry coil pack testing with multimeter ?? 2 Answers I have 99 Camry 4 cyl. Once the coil is out, you can check the primary and secondary resistances using a multimeter. Coil pack equipped vehicles with higher mileage may experience coil pack failure. 1 answer 1. Late model Fords are equipped with coil packs rather that the old style individual coils for each cylinder. Engines on Stihl trimmers, chainsaws, blowers, edgers and cultivators are two-cycle. 17ohm X4 Mesh Coil. How to test CDI, Magneto stator coils & Hall Effect sensors on domestic engines I think this topic deserves its own thread. 9 Ohms, anything outside this range means the coil-pack is finished and is likely causing spark issues. If a spark is present, the ignition coil is working properly. The new ProC-BF series head made of pure cotton was especially designed for mouth to lung vapors. 2s for a smoother and cooler draw. When it’s time to recharge just click the magnetic USB charger into place. The primary resistance is measured from the two contacts where the coil contacts the DFI module. Test the Resistance on Each Coil. This will test the 3-4 coil pack. Re: NorthStar V8 Coil Pack Ignition and Module. An absence of spark will require replacement of the ignition coil. The bad one is "B1". Test specifications to expect follow at the bottom of the page. Order today, ships today. This battery could check OK on a voltage meter, but it would not hold a charge for an extended time. You should observe about 1. Note the resistance reading on the ohmmeter. You can look up the injector resistance value in the service manual for your particular vehicle make and model. When you turn the ignition key, the battery sends voltage to the spark. Watch the spark tester or spark plug, looking for a spark between the electrodes of the tester or spark plug. That high resistance slows down the charge rate of the coil and limits the energy it can store. Connect the probes to either end of the wiring connectors, the meter with show the resistance in the connection. You don't need any fancy tools to test a Jeep ignition coil. You'll need to: Resistance test each of the 4 fuel injectors. Want to learn how to use a multimeter to test your ignition coil circuit? The Toyota part number for this ignition coil is 90919-A2007, and it can also be found under the Toyota part number interchange of 91919-02251. If you have an accurate voltage meter, you can fire the coil with a fully charged battery and see what the voltage measurement is across the coil. Shop now for Electronics, Books, Apparel & much more. DC motors draw power from deep cycle (DC) batteries. 7L V-8 COP Coil Test. 7 and reading the other way your meter should read a far higher number. You can check the resistance with a multi meter that allows you to test ohms or a dedicate ohms meter. The power pack supplies voltage to the ignition system's power coils. In order to test a moped coil you need to use an ohmmeter. Just wanted to update you on how pleased I am with the Granatelli Hot Street Coils on my '07 Mustang GT (Vortech V2 supercharger - non intercooled). open circuit? coil is no good? Is there another test I can run on this. RE: Any one show me how to test the ohms using a multimeter. Attach both leads of the meter to the coil-terminals with black to the negative terminal and red to the positive one. Start the test with either a cool or a warm engine. I picked up a couple mph in trap speed at the drag strip vs the stock coils and ran a best ever 11. On an electronic tester, simply follow the instructions on how to perform the voltage test and the tester will run the test and report the results. Can I test a solenoid successfully with a multimeter? procedure? The solenoid valve for my PTO is blowing the 10A fuses as quick as I can put them in. In order for you to learn how to test a Honda Accord ignition coil, you will need a 10mm wrench or socket and a multimeter. Place one lead on the center prong of the coil pack's electrical connector and the other lead on each of the spark plug terminals. (2k ohm meter scale/ range) If it reads infinity the sensor is bad. Ohm readings should be 1. 5 to 5 K ohms,. if you need to know how to remove the coil pack let me know, to test put on ohms should not have more than 2 1/2 ohms restance betweent coil lead to coil connector. Testing the ignition coils on your 3. A worn-out ignition coil quickly diminishes your vehicle's power and performance over time. Pull the plug wire and push in a screwdriver so it touches the cap that fits over the spark plug. Installation of 3-Phase Energy Meter. The PDF in Post #14 (Coil test. To do this however you’ll need a digital multimeter to measure resistance of the coils. You could load test them but you would need extensive equiptment. Likes Received: 3,097. You can turn oil pump shaft with a big flat blade screwdrive. If you find one shorted, replace the whole pack - if you put it back in, it will probably fry the TCM and drop you into limp mode. Payments made before 5 p. Lastly, the reading from the meter should be plus or minus 10 percent of the rating on the capacitor. Touch the negative (black) battery terminal with the negative (black) meter probe. In this step-by-step guide, we will go over how to test if an ignition coil is good or bad, by testing the resistance using a digital multimeter. A multimeter won't test for good spark. 1 Remove the complete air filter assembly from the air flow meter (AFM). Gain access to the shorted cell(s) by removing the outer covering or case of the battery pack and test the individual cells with a multimeter. 0L] Testing the coil pack with a multimeter (ohms) - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum. That high resistance slows down the charge rate of the coil and limits the energy it can store. Can anybody tell me how to test the coils packs and what voltage each wire should be at the igniter and coil pack. The CB Antenna's Electrical Ground.