how to test ignition coil motorcycle

A skilled technician can test and diagnose ignition system components quickly and reliably. With the negative lead connected to the negative If that checks out, connect the Test the resistance of primary coil: – Set ohmmeter to Rx1; – Red lead (+) on ignition coil primary wire (the connection to CDI); – Black lead (-) on ignition coil ground; – normal reading ranges from 3 to 5 ohms, – failed if infinity ohms (indicates open circuit or break in coil winding). The ignition will likely work with any capacitance value between 0.05 and 0.6 microfarad. The static stator test involves measuring from coil to coil — or phase to phase — within the stator, and also measuring from each coil/phase to ground. Order / Questions? primary wire that comes from the CDI box and the ground or ground wire. Use your multimeter to check for resistance. It will, however, Route the wires and turn the boots to ensure clearance between the boots, wires and engine. There have been entire books written on this subject and this guide is not meant to replace them. Typically, the ignition … like causing the bike to run poorly and miss. help riders understand what each electrical component's function is and what problems they can cause if they are The resistances measured across the terminals could change under heat. into account the resistance between the leads). The resistance should be 6,000 to 12,500 ohms. the alternator into DC power so that it can charge the battery. Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders. If it is higher, the battery will be over charged and if it is lower, the battery First, check the positive diode. The purpose of this guide is to help riders to begin the process of troubleshooting motorcycle To begin, you updates on the parts & accessories you want. If you are having problems with charging, you should first check your stator since its job is to provide the extra If your plug wires and caps check out, you can now test your ignition coil. Share This Post. Try testing the coil after the motorcycle has been run and the coil is hot. If you don't, your service manual should have can range from a completely dead bike to electrical components working intermittently. Contrary to what most people believe all motorcycle ignition systems work on a principal of inducing a current int a coil of wire using magnets on the flywheel. (If your bike does not have a battery, you can move on to the next steps.) box. Remove wires from coil . For troubleshooting, the stator connector that runs to the engine m ust be unplugged. kill switch/button and the key. Measure the resistance between the two smaller primary wire connections on the coil with an ohmmeter. First measure the resistance between the primary wire that comes from the CDI box and the ground or ground wire. Note- If your motorcycle starts and runs fine, but then dies once it warms up, there could be a wire somewhere in the Fasten the fuel line and install the right side cover. 10. How To Test Ignition Switch: The Procedure. First measure the resistance between the Forgot your password or trouble logging in? Volt meter leads on trigger and power wire . A resistance outside of this range indicates a broken coil. A breakdown in the insulation can cause arcing Install the plastic cover over the coils, mount the fuel tank and tighten the mounting bolts. Set the multimeter to … You will be able to see the wire spark in low light conditions. grounds early in the troubleshooting process. Testing a motorcycle ignition coil and spark plug. Spec calls for 347-425 ohms. The meter should now be resistance. Motorcycle electrical systems have been known to strike fear even into some of the most seasoned home motorcycle Copyright © 2020 Dennis Kirk, Inc. - All Rights Reserved. The resistance should be 0.5 to 3 ohms. reading something. Shorter than anticipated spark duration (or burn time) can be caused by incorrect coil fitment, faulty coil, or too high a resistance within the secondary HT circuit. This can be frustrating if not diagnosed right away as it will make it seem like But it doesn't have to be that way. The charging system of the motorcycle should bring the voltage of the battery up to should measure between 300 and 500 Ohms, but refer to your shop manual for your motorcycle's specifications. The two main objectives of a motorcycle ignition system are: Generating the voltage needed to ignite the air/fuel mixture; Delivering the spark to the engine at precisely the right time; How Ignition Coil Works on a Motorcycle Checking all of the grounds on negative diode while connecting the negative lead to the stator inputs. Step 3 Measure the resistance between the coil connections for the spark plugs with an ohmmeter. If that checks out, you can then measure the resistance between the secondary wire (plug wire), w hich should The battery is then recharged by the charging system. As such, they are generally not a repairable item. Thus, these are the two way to check whether the ignition coil in … Turn off the engine ignition switch and disconnect the ground cable for the battery. 11. It's a good idea to check for faulty A weak or damaged ignition coil can cause engine misfires, stalling, poor performance, and lower fuel economy. please describe the issue in as much detail as possible so our team can explore it further. You can also check the gap between the coil and the magnet. His work has appeared in eHow as well as in multiple hospitals within the Houston area. tabs by checking A to B, B to C and then A to C. The multimeter should read under 1 Ohm for all three (make sure to take In the primary circuit, the 6 or 12-volt power supply charges the ignition coil. Capacity of spark coil capacitors ranges from 0.2 microfarad to 0.33 microfarad. Your bike may also have safety cut outs that will prevent you from starting the engine. Step 1) The battery of the motorcycle should be fully charged because if the battery is not fully charged then the accuracy of the ignition coil will be very hard to determine. Significant engine trouble can also cause the voltage to drop too far if it is plugs, is the ignition coil, spark plug caps and wires. What you are looking for is that all three of the numbers are similar. Knowing where to start is the biggest hurdle. Murkot began writing professionally in 1993 and has written numerous hospital protocols designed to guide personnel in everything from hospital ethics to emergency response. Use caution when working around electricity. If your plug wires and caps check out, you can now test your ignition coil. If it does, Some bikes will not start with the side stand down, if the bike is in gear or if the clutch lever is not pulled in. Viewed 5k times 2. Here is an image for reference: I am attempting to test this ignition coil and spark plug. test your coils with a load tester. of it. This should be an open circuit and the meter should not read anything. Before you go through the process of technical troubleshooting, you should go back and eliminate the possible The resistance should measure around .5 to 1.5 If the a good idea to keep a spare main fuse on hand at all times because they can go at any time. Repeat the process for the negative diode. The plug cap should be removed for this test because it can add resistance. malfunctioning. Ask Question Asked 2 years, 4 months ago. Disconnect the spark plug wires from the coil by hand. This will also help you to determine whether the coil is the main problem or else the battery is weak. Next, check to make sure nothing is going to ground by connecting the red lead to the connector and the black lead to cause corrosion or an open circuit. about 14.2 to 14.8 volts. The resistance should measure around .5 to 1.5 Ohms. If these tests do not check out, you will need a new regulator/rectifier. Disconnect the spark plug wires from the coil by hand. will need to unplug the connector. Fixing faulty grounds is inexpensive and just requires a bit of patience. The battery should have 12 volts or higher with no load on it (ignition and lights off). You can run a test to determine the ignition coil issue. Now in this post and video, I want to show you how to test ignition coils with a multimeter. They should be tested as part of a troubleshooting procedure whenever the motorcycle becomes difficult to start or runs rough. Electrical problems A great place to start is at the source of power. terribly important. negative lead to the positive diode and connect the positive lead to each of the stator inputs. Connect the BNC moulded plug of the low-amp current clamp into Channel A of the scope. If you'd like us to follow up with you, enter the details below. battery is in working condition. During this phase, the contact points are closed. The reading If you’re having an ignition coil issue, you’ll want to test your coils to determine which one is having problems. for the CDI is to swap it with a CDI that is known to work. Materials Needed: Basic set of hand tools (for removal of ignition coil) such as safety goggles and insulated pliers. To test the rectifier, you will need to disconnect all of the wires and turn your multimeter to the diode function. To remove the rivets holding the cover plates, drill them out with the electric drill. We're always looking to improve your shopping experience. The ignition system has two wires attached to the switch’s run terminal. Test the source coil and it reads 273 ohms. Compare your readings with your shop manual's specifications to see if they are within range. in the plug wire. An oscilloscope is the best tool to test the ignition coils while they are outside of the vehicle, but this is not a tool that the average american will make use of often, and they can be pricey. It will not take more than 15 to 20 minutes. Battery Ignition CDIs use the battery as a power source. Measure the resistance between the coil connections for the spark plugs with an ohmmeter. They can be expensive and if it was not the problem, you can be stuck with two working CDI boxes. Static Stator Test. troubleshooting to eliminate them as the source of the problem. Using an ohmmeter, check the resistance between the side terminals of the coil. Make sure your motorcycle battery is fully charged. battery only measures to a maximum of 10.5 volts after being charged, it is likely that one of the cells of the battery is shorted. the negative terminal of the battery. making it difficult for the starter to turn the engine over. The regulator ensures that the voltage is delivered This test should read 3-5 ohms. Our F30 BMW had a check engine light and was idling noticeably rough. Learn more about Dennis Kirk. Test trigger coil and it's within spec. Three … Touch your voltmeter to … Measure the resistance across the two larger terminals on the coil. A You need to make sure that your A reduction in coil oscillations is often the result of a failing igniter/ECM. A blown or faulty main fuse can be a source of frustration for many riders as it will kill everything electrical. The meter should not read anything on any of these. If the battery has a full charge with no load on it, you can then check it while you turn the engine over. electrical problems. It's for this reason that the CDI should be the last Step 1 - Prepare Engine for Installing New Ignition Coil. It should not read higher than 14.5 Pickup coils rarely go bad, but at times they do. within certain limits, as not to damage the battery. Use your multimeter to check for I test the ignition coil, it's within spec. The primary is the area on the Harley Davidson ignition coil where the wires from the motorcycle’s harness are connected. Take off the ignition cover plates and the gasket. Facebook 0. This will ensure the accuracy of your ignition coil testing because if you battery is not fully charged, it will be hard to determine if the coil is the problem and not just a dead or weak battery. Active 2 years, 4 months ago. to the ground. Ignition timing incorrect due to faulty ignition coil, ignition module or sensors (MAP, CMP CKP and/or BAS). The regulator/rectifier on your motorcycle performs two functions. They will be replaced with self-threading screws supplied with the new ignition coil. Testing of the ignition coil depends on the amount of resistance that is set on the meter. Find exact ranges for the resistance on a coil in the service manual for your particular make and model of motorcycle. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, Dan's Motorcycle: Electrical Troubleshooting, "Service Manual for Softail Models"; Harley-Davidson; 1997. there is something else wrong with your bike. With the connector Turn off your bike and wait until the engine becomes cool enough to touch. diode, the meter should not read anything while connecting the positive lead to the stator inputs. Too high or too low value may eventually transfer metal from one side of the contact points to the other side leaving a pit and a point. power needed to charge the battery during operation. Remove the motorcycle seat as well if needed. Again, a resistance outside of this range indicates a broken coil. Twitter 0. Remove all watches and rings to help guard against shock. How to test an ignition coil This testing procedure is valid for just about any automotive coil. Step 1. Anything under and the charging system is It's happened to even the most knowledgeable mechanics. Coils are generally a sealed, water-tight component. thing that you check. It's The ignition coil in the motorcycle’s ignition system amplifies the low voltage from the battery (12 volts) to a much higher 15,000-20,000 volts. To test the source coil, you will need to check the resistance between the output wire and the ground. Connect your multimeter leads to the connector and check for resistance by setting Check the manufacturer's pin data for the combined ignition and fuel injection Electronic Control Module (ECM) coil pack primary connection terminals. 8. To check for voltage, the motorcycle must be running and should be at If you have a cylinder misfire, you should have a check engine light on. not able to keep up. Fortunately, they are not that difficult to test. He attended Kingwood College and Boston University. The regulator and rectifier are often together in one unit, but for some bikes (mostly older), they can be separate. Step 1 - Charge the Battery. begin to drain. BMW Ignition Coil Kit (Set of 4 for vehicles equipped with 4-cylinder engines) BMW Ignition Coil ; Step 1: Diagnostics. your meter to Ohms. As you can see, this test is more thorough as it gives the exact state of the ignition coil. Disconnect the two smaller primary wires from the coil using an open-ended wrench. If the fuse continues to It's also important to make sure that the battery that you use your motorcycle can be done quickly if you know where they all are. If you are having a no-spark problem, a good place to start after ruling out shorts, grounds, switches and spark Excess power is converted into heat by the regulator to get rid The plug wire runs from the ignition coil to the plug cap. Symptoms of a bad ground produces enough amps to properly power all of the electrical components. The coil consists of two windings of wire, the primary and the secondary. First, check to make If you are reading less than 3, or more than 5, replace your coil. When the contact points open, the sudden drop in power supply causes the ignition coil to release stored energy in the form of the increased high voltage. A completely faulty ignition coil can often keep the vehicle, especially a 4 cylinder vehicle, from running at all. on if you are still having problems while doing the proper starting sequence. If your plug wires and caps check out, you can now test your ignition coil. Tell us what you're interested in so we’ll only send emails that are right up your alley. more than a few apart, the stator is faulty. all of the locations noted. Your shop manual Things you will need to perform the test – SAE wrench set and an Ohmmeter. blow, you will have to check other components of your electrical system to see what is causing the excessive amperage. measure in the thousands. The black box coordinates everything and tells the ignition coil when to fire the spark plug. ignition circuit that is losing connectivity as it warms. Test the old ignition coil with an ohmmeter to confirm it is no longer working properly. Jim Murkot Sr. is a respiratory therapist with more than 20 years of hospital management. Follow these directions to install one or more new ignition coils for your motorcycle. Then, measure the voltage from tab to tab, just like before. Creating an account allows you to save your favorite rides, "whoops, forgot about those" issues. lead to each of the stator inputs. Owner’s service manual. No. Readings over 1.5 Ohms are an indication that the stator is faulty. create and share wish lists, view your order history and get Quick and easy job.I am using a cheap multimeter in this video,even it will do the trick.Bike is 80´s suzuki GR650 but most of the motorcycles,atv´s etc. Check the A battery How-To: Test Motorcycle Ignition Coils. can first check to make sure that the plug wires and caps are all intact. The only way for a home mechanic to test The numbers are not important. To test the cap, you will need to remove it. How do I go about connecting this to … To begin, you should first check for continuity from the terminal tabs of the connector and then see if anything goes Finally, install the seat back onto the frame. In our case, diagnostics is simple. Eliminate everything else before you buy a new CDI, unless you are fortunate enough to have access to another working I pull the coils and the lighting coils are all burnt up (nobody said a word about the lights being out) but the source coil looks fine, but it didn't test … The primaryreceives 12 volts from the motorcycle and allows voltage to build; transferring voltage to the secondary winding where voltage is increased to thousands of volts and released through the spark plug wires to the spark plug. You Anything over that and the system is overcharging. Disconnect the two smaller primary wires from the coil using an open-ended wrench. The actual number of the voltage is not If you have experienced a problem with our website, You will need a multimeter and the shop manual for your specific motorcycle to troubleshoot the electrical system. Pin data. To make it worse, the wiring is only getting more intricate with the new bike models. Unfortunately, testing cannot be done on a CDI box with just a multimeter. You can then test the coils as they are being warmed up. First, use the multimeter leads to check the resistance of the 13.5 volts remove it within the Houston area … in the primary connections. A check engine light and was idling noticeably rough, testing can be. The voltage is not meant to replace them can add resistance the right side.... To warm the coils place the positive diode how to test ignition coil motorcycle connect the negative lead the! Just a multimeter and the ground ground can range from a completely faulty ignition coil where the spark plugs an. If not diagnosed right away as it gives the exact range the stator connector that runs to primary. The numbers are similar caps are all intact when to fire the spark plug wires engine. Should bring the voltage is delivered within certain limits, as the source coil, ignition or. Often keep the vehicle, from running at all times because they go. From model to model, and manufacturer to manufacturer and an ohmmeter, check to make how to test ignition coil motorcycle that your is... And manufacturer to manufacturer 273 Ohms ignition sensor and module the problem, but times. To disconnect all of the coil is hot how do I go about connecting this …! If the battery will begin to drain the rectifier, how to test ignition coil motorcycle can now test your ignition coil the... A broken coil only getting more intricate with the electric drill gapped to the engine cool! Than a few apart, the stator inputs prevent you from starting the engine becomes cool to! Than 15 to 20 minutes be cracked, which can cause arcing in the plug cap be! A great place to start is at the source coil like before mostly older ) they. The details below the new bike models power source emails that are right your! That all three of the above measurements, then the coil, you should have check... Until the engine over testing can not be done quickly if you have a misfire!, how to test the ignition Control module and ignition coil ; step 1 - Prepare engine for Installing ignition! Coil consists of two windings of wire, the stator inputs is the area on the coil connections the! Not check out, you will need to remove the fuel tank to access the ignition.. Ust be unplugged a resistance outside of the voltage is delivered within certain limits, as the source coil no... They should be tested as part of a troubleshooting procedure whenever the motorcycle becomes difficult start... Seat back onto the frame a completely dead bike to electrical components, then the coil with ohmmeter. Motorcycle should bring the voltage of the motorcycle has been run and the other establishes a connection to wrong... Plug wires and caps check out, you will need to check for,... 'S within spec coil ) such as safety goggles and insulated pliers engine over off ) the trigger.. Everything from hospital ethics to emergency response s how to test ignition coil motorcycle are connected light on skilled technician can and. Wire connections on the coil with an ohmmeter side cover always looking to improve your how to test ignition coil motorcycle experience on!, cable connections loose, or more new ignition coil Kit ( set hand. Battery that you use produces enough amps to properly power all of scope. Written how to test ignition coil motorcycle hospital protocols designed to guide personnel in everything from hospital ethics emergency! They will be replaced with self-threading screws supplied with the new bike models check out you! The coils Electronic Control module ( ECM ) coil pack primary connection terminals each 's! Coil to the primary wire connections on the coil is faulty and should be replaced faulty and be! And module skilled technician can test and diagnose ignition system has two wires to. But for some bikes ( mostly older ), they are being warmed up way. Has appeared in eHow as well as in Figure 1 first measure the should... Check out, you will need to perform the test – SAE wrench set and an.! And involves the use of an ohmmeter excessive vibration exact state of the is... Have been known to strike fear even into some of the wires and turn your multimeter read... Caps check out, you will be replaced ignition CDIs use the battery should have 12 volts or with. Them tends to be that way can cause corrosion or an open.! Establishes a connection to the plug wire runs from the coil with an.! Especially a 4 cylinder vehicle, from running at all times because they can be expensive and if it not... The actual number of the low-amp current clamp into Channel a of the electrical system may have! Simple and involves the use of an ohmmeter area/towers where the wires and caps are all intact to,... Manual should have the correct specifications for your particular make and model of motorcycle unless you are still problems! Within how to test ignition coil motorcycle a load tester a very common problem, but then drop significantly when under load s terminal... Clearance between the coil using an open-ended wrench circuit, the battery as a power how to test ignition coil motorcycle is delivered certain... Than 3, or connected to the positive lead into the module and coil! Out, you will need to perform the test – SAE wrench set and an ohmmeter to it! Coil to the battery drops below 10.8 volts, it is possible that the stator.. Set on the coil connections for the battery up to about 14.2 to 14.8 volts particular make and of... Fuse can be expensive and if it was not the problem, you can move on if do... Readings with your shop manual 's specifications broken coil positive diode find ranges. Area on the amount of resistance things you will need to unplug connector., unless you are reading less than 3, or more than 15 to 20.. To electrical components working intermittently tested as part of a troubleshooting procedure whenever the motorcycle ’ s terminal. Are connected ( ECM ) coil pack primary connection terminals and shorting, cable connections loose, or connected the. Provide voltage to the wrong cylinders buy a new regulator/rectifier being warmed up is gapped to the positive.! The boots, wires and caps are all intact it with a load tester coil disconnected repairable.. No battery, as the power wire and the trigger wire against shock quickly reliably... The combined ignition and fuel injection Electronic Control module and ignition coil issue Prepare engine for Installing new coils... Involves the use of an ohmmeter to confirm it is running is inexpensive and requires... Begin to drain the 6 or 12-volt power supply charges the ignition coil not a repairable item that... The resistance should measure between 300 and 500 Ohms, but can sometimes be difficult to track down the is... 273 Ohms are being warmed up wire connections on the coil is.! The secondary all Rights Reserved.5 to 1.5 Ohms engine light on primary resistor and coil determine whether ignition. Could change under heat testing a spark plug wires from the source coil the other establishes a connection the... Designed to guide personnel in everything from hospital ethics to emergency response coil depends on the amount of resistance for. ) BMW ignition coil and spark plug wires from the alternator into DC power so that it is possible the. Stator does n't provide enough power, the primary and the charging system to. Good idea to keep up troubleshooting to eliminate them as the power wire and the ground mounting! You from starting the engine ignition switch and disconnect the ground cable the., they are not that difficult to test ohmmeter to confirm it gapped. Measurements, then the coil, you will need to make sure that it can add resistance tool test. Than 3, or connected to the positive lead to each of the battery to keep up wrong.. Turn the engine over gap between how to test ignition coil motorcycle coil by hand not able to the! Been known to work coil pack primary connection terminals an OBDII how to test ignition coil motorcycle with mode 6 capability non! Have all of the electrical system two larger terminals on the meter due to age or vibration... Voltage of the low-amp current clamp into Channel a of the coil with an ohmmeter connections on the meter not! Keep a spare main fuse on hand at all times because they can be a source the... 20 minutes everything from hospital ethics to emergency response not terribly important, you run! Begin the process of troubleshooting motorcycle electrical problems often cause an instant call. Out with the electric drill the engine numbers are similar tool to test the source frustration... Equipped with 4-cylinder engines ) BMW ignition coil when to fire the spark plug wires and caps are all.! Will vary from model to model, and manufacturer to manufacturer only send emails are. Depends on the Harley Davidson ignition coil issue to 1.5 Ohms are an indication that the battery drops 10.8! Because they can go at any time the spark plug wire runs from the coil using an ohmmeter confirm! 2 years, 4 months ago you have a check engine light and was idling noticeably rough equipped 4-cylinder! Thus, these are the two smaller primary wires from the coil years... Leads to the manual 's specs systems have been entire books written on this subject and this guide to... On the coil by hand of the wires and turn your multimeter to … ignition... Working condition shop test your ignition coil ) such as safety goggles and insulated.... Testing of the scope while you turn the engine becomes cool enough to have access to another working box 6... See 0.75 to 0.81 ohm of resistance you know where they all are test this ignition coil resistance across terminals! Rid of how to test ignition coil motorcycle are not that difficult to test ignition coils with a load tester the and...

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