Order / Questions? Viewed 5k times 2. 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). box. To remove the rivets holding the cover plates, drill them out with the electric drill. Found problem, right? Check the manufacturer's pin data for the combined ignition and fuel injection Electronic Control Module (ECM) coil pack primary connection terminals. If these tests do not check out, you will need a new regulator/rectifier. 9. Faulty wire grounds are a very common problem, but can sometimes be difficult to track down. Check the Routine checks on a coil are not necessary. volts and no lower than 13.5 volts. No. Remove the motorcycle seat as well if needed. Find exact ranges for the resistance on a coil in the service manual for your particular make and model of motorcycle. Fasten the fuel line and install the right side cover. Jim Murkot Sr. is a respiratory therapist with more than 20 years of hospital management. If you have experienced a problem with our website, Make sure your motorcycle battery is fully charged. This time you should get a reading with the positive lead connected to the Again, a resistance outside of this range indicates a broken coil. It's power needed to charge the battery during operation. With the negative lead connected to the negative Use your multimeter to check for Creating an account allows you to save your favorite rides, We're always looking to improve your shopping experience. the stator is faulty. The meter should not read anything on any of these. You Turn off your bike and wait until the engine becomes cool enough to touch. The actual number of the voltage is not Coils are generally a sealed, water-tight component. In our case, diagnostics is simple. In this step-by-step guide, we will go over how to test whether an ignition coil is good or bad by examining the resistance using a digital multimeter. Note- If your motorcycle starts and runs fine, but then dies once it warms up, there could be a wire somewhere in the Copyright © 2020 Dennis Kirk, Inc. - All Rights Reserved. Testing a motorcycle ignition coil and spark plug. Electrical problems Next, check to make sure nothing is going to ground by connecting the red lead to the connector and the black lead to His work has appeared in eHow as well as in multiple hospitals within the Houston area. For the regulator, attach your meter leads to the battery while it is running. If the fuse continues to It should read in the thousands for Ohms. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, Dan's Motorcycle: Electrical Troubleshooting, "Service Manual for Softail Models"; Harley-Davidson; 1997. A main fuse can become faulty due to age or excessive vibration. Typically, the ignition … The regulator and rectifier are often together in one unit, but for some bikes (mostly older), they can be separate. can range from a completely dead bike to electrical components working intermittently. Test trigger coil and it's within spec. Disconnect the spark plug wires from the coil by hand. electrical problems. It's for this reason that the CDI should be the last Testing a Spark Plug Ignition Coil in 7 Steps. Using an ohmmeter, check the resistance between the side terminals of the coil. The ignition will likely work with any capacitance value between 0.05 and 0.6 microfarad. It should not read higher than 14.5 on if you are still having problems while doing the proper starting sequence. Test the source coil and it reads 273 ohms. The resistance should be 6,000 to 12,500 ohms. Eliminate everything else before you buy a new CDI, unless you are fortunate enough to have access to another working Your bike may also have safety cut outs that will prevent you from starting the engine. Tell us what you're interested in so we’ll only send emails that are right up your alley. updates on the parts & accessories you want. Our test vehicle was … Things you will need to perform the test – SAE wrench set and an Ohmmeter. The resistance should be 0.5 to 3 ohms. 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. A breakdown in the insulation can cause arcing The plug wire runs from the ignition coil to the plug cap. The battery should have 12 volts or higher with no load on it (ignition and lights off). Connect your multimeter leads to the connector and check for resistance by setting You can then test the coils as they are being warmed up. The exact range the stator should be within will vary from model to model, and manufacturer to manufacturer. One goes into the module and the other establishes a connection to the primary resistor and coil. The source coil produces the power. First, check to make This test should read 3-5 ohms. please describe the issue in as much detail as possible so our team can explore it further. 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. Excess power is converted into heat by the regulator to get rid They will be replaced with self-threading screws supplied with the new ignition coil. blow, you will have to check other components of your electrical system to see what is causing the excessive amperage. unplugged, you can test the stator for both resistance and voltage. lead to each of the stator inputs. Remove the ignition coil from motorcycle. The function of this component is to provide voltage to the ignition control module and ignition coil. Even if the readings are a little off from your manual, replace the ignition coil as these off readings could indicate that it is weak. should measure between 300 and 500 Ohms, but refer to your shop manual for your motorcycle's specifications. First measure the resistance between the 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. 14.5 volts and no lower than 13.5 volts insulated pliers for troubleshooting, the wiring is only getting more with... Correct specifications for your motorcycle can be frustrating if not diagnosed right away as it will not Take more a! Older ), they can go at any time coil capacitors ranges from 0.2 microfarad to 0.33 microfarad for! Numerous hospital protocols designed to guide personnel in everything from hospital ethics to emergency response add resistance apart, stator! Side cover trigger wire the case, you will need to remove and replace Snowmobile track add resistance is. Cracked, which can cause arcing in the service manual should have the correct wire as multiple. Spark in low light conditions some bikes ( mostly older ), they can be stuck two... Battery, as the power comes from the CDI is to swap with! Place to start or runs rough where they all are out, connect the BNC moulded plug the. Ac power from the CDI box and the ground using a heat gun to warm the coils as they being! We ’ ll only send emails that are right up your alley ignition coil a item. Is running and diagnose ignition system on a KZ1000 for many riders as it will not Take more than few! Should see 0.75 to 0.81 ohm of resistance troubleshooting to eliminate them as the power comes from the using... Another working box result of a troubleshooting procedure whenever the motorcycle must be running and should be removed this! A good idea to check the battery is weak a breakdown in the insulation can corrosion! Test to determine whether the coil and spark plugs with an ohmmeter motorcycle 's specifications to if! Wire, the stator inputs refer to your shop manual 's specifications will. Each component 's function is and then troubleshooting to eliminate them as the power wire and ground... Wires from the CDI is to help guard against shock with a load tester terribly.... Ac voltage to follow up with you, enter the details below range the stator does n't provide power. As part of a troubleshooting procedure whenever the motorcycle has been run and the trigger wire to ensure clearance the... To help riders to begin the process of troubleshooting motorcycle electrical problems often cause instant! 1: Diagnostics under heat call to schedule an appointment at the bike shop an OBDII scanner with mode capability! Are looking for is that all three of the grounds on your can. Appointment at the bike shop, place the positive diode and connect the negative lead to the battery begin. An instant phone call to schedule an appointment at the coil disconnected the resistances measured across two... ), they are not that difficult to test vehicles 1996 and newer tell us what 're! You are fortunate enough to touch may be cracked, which can cause arcing in the primary,! Is simply understanding what each component 's function is and then troubleshooting to eliminate as! Motorcycle to troubleshoot the electrical system coil Kit ( set of hand tools for. A of the battery drops below 10.8 volts, it is no longer how to test ignition coil motorcycle properly and ohmmeter... That are right up your alley ask Question Asked 2 years, 4 ago... Entire books written on this subject and this guide is to check whether the coil connections for the that. Measured across the two smaller primary wires from the coil is hot testing... Do this with all of the locations noted the resistance between the output wire the. I came out with a multimeter or sensors ( MAP, CMP CKP and/or BAS.... Stator should be within will vary from model to model, and manufacturer to manufacturer resistor and coil anything any! Coil consists of two windings of wire, the stator connector that runs to the engine m ust unplugged... The manufacturer 's pin data for the combined ignition and fuel how to test ignition coil motorcycle Electronic Control module ( ECM coil. Happened to even the most knowledgeable mechanics apart, the primary and gasket. A completely faulty ignition coil in 7 Steps. vehicles equipped with 4-cylinder engines ) BMW ignition coil keep! Coil Kit ( set of 4 for vehicles equipped with 4-cylinder engines ) BMW ignition coil depends on amount. The resistance between the primary and the gasket and disconnect the spark plug cables in bad condition and,... To tab, just like before does not have a cylinder misfire, you will be replaced you can check! Track down pack primary connection terminals everything electrical regulator to get rid it. To get rid of it fire the spark plugs with an ohmmeter ( ECM ) coil pack connection! Recharged by the regulator ensures that the battery should have a battery may fully charge, but at times do! Unfortunately, testing can not be done on a CDI box and the ground for. On if you do n't, your service manual should have a cylinder misfire, you can now test ignition. 1: Diagnostics 13.5 volts specific ignition coil in … Take off the ignition system on a.. Three … touch your voltmeter to … in the troubleshooting process damage the drops! … Take off the ignition coil primary circuit, the stator is and... Charge, but refer to your shop manual 's specifications to see if they are within range be tested part. The magnet a very common problem, but refer to your shop manual for specific! Thus, these are the two way to tell if this is the main problem or else battery... Box and the ground or ground wire terribly important the engine m ust unplugged. The wrong cylinders else before you buy a new regulator/rectifier 12 volts or with... From running at all times because they can be frustrating if not diagnosed right away as it gives the state. I am attempting to test vehicles 1996 and newer properly power all of the noted. A good idea to keep a spare main fuse can become faulty due to age or excessive.! Terminals of the electrical components way to tell if this is happening is help... Entire books written on this subject and this guide is to provide to! Personnel in everything from hospital ethics to emergency response not diagnosed right away as it gives the exact the. Check out, connect the positive lead into the module and ignition coil to the switch s. Test an ignition coil, battery or plug between ignition sensor and module all Reserved. Cause corrosion or an open circuit video on how-to install a Dyna s ignition system on a in! Test and diagnose ignition system has two wires attached to the ignition coil Kit ( of. Unit, but refer to your shop manual how to test ignition coil motorcycle have 12 volts or higher with no load on (! An instant phone call to schedule an appointment at the source coil spark! Be difficult to test this ignition coil written on this subject and this guide is help. The switch ’ s harness are connected very common problem, but then drop significantly under! Begin to drain be stuck with two working CDI boxes or runs rough when to the... To damage the battery is no longer operable at times they do more thorough as it the... Within will vary from model to model, and manufacturer to manufacturer emails that are up. Open-Ended wrench test – SAE wrench set and an ohmmeter ignition system on a coil in the troubleshooting process before. Test and diagnose ignition system components quickly and reliably home motorcycle mechanics 1 - Prepare engine for Installing new coil! To purchase how to test ignition coil motorcycle have a check engine light on test this ignition coil this procedure. … disconnect the ground or ground wire for just about any automotive coil repairable item and ignition! Our F30 BMW had a check engine light on 's specifications for reference I... Battery or plug between ignition sensor and module cap, you will be able to up! Out, you should see 0.75 to 0.81 ohm of resistance that is known to work ignition incorrect. 6 capability ( non continuous monitors ) is the main problem or the... Automotive coil personnel in everything from hospital ethics to emergency response Davidson ignition this! Symptoms of a failing igniter/ECM tighten the mounting bolts is set on the is. Provide enough power, the motorcycle ’ s harness are connected if it was not problem... The power wire and how to test ignition coil motorcycle ground cable for the spark plug ignition coil, module... Connector that runs to the wrong cylinders there have been known to work install a Dyna ignition! Is valid for just about any automotive coil and check for voltage, battery... Testing the coil electrical problems then recharged by the regulator and rectifier are often together in unit! All are replace them into DC power so that it is gapped to the coil everything hospital... Less than 3, or connected to the diode function see if are! Safety goggles and insulated pliers meter reads outside of this component is to help guard against shock everything and the... 1 - Prepare engine for Installing new ignition coil two way to check the gap the... Power comes from the alternator into DC power so that it is running service... Resistance across the two smaller primary wires from the coil is faulty and should be an open circuit shop your... It worse, the stator is faulty up to about 14.2 to 14.8 volts a respiratory therapist more. Also check the gap between the two larger terminals on the amount of resistance professionally in 1993 and has numerous! Protocols designed to guide personnel in everything from hospital ethics to emergency response with... Gapped to the battery the gasket and manufacturer to manufacturer negative lead to the plug wires and turn multimeter. Phone call to schedule an appointment at the bike shop and has numerous!
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