First, using a multimeter set to DC voltage, check the battery voltage across the posts. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. One … Remove the wires from the coil. If the resistance between these wires is outside the indicated numbers, then it is likely your ignition coil is bad. Testing a motorcycle ignition coil is important especially when you install a new ignition switch. Revival Cycles’ BMW Landspeeder Is a Blast From the Past! Mastech Multimeter on Amazon for $25. All rights reserved. Always be sure that you are using a quality, known good battery in your motorcycle.Sometimes an owner may be looking for a parasitic draw, but is really only dealing with a weak battery. You'll want to see a reading of 13.8 to 14.5 volts to know that your stator and regulator/rectifier are operating properly and charging your battery. All information is provided "AS IS." Un-efficient Fuel Consumption. This result should be high around 6000 to 13000 ohms. How do I test the Ignition (HT) Coil? If it is bad then you can either replace the coil or consult the mechanic with the readings that are recorded. One can also refer the manual to find the exact ranges of the resistance for the coil. The primary wire is the one that is going towards the CDI points or CDI box. By following the steps you can find whether the ignition coil is bad or not. Make sure your motorcycle battery is fully charged. If using DOHC or most aftermarket "hot" coils the reading should be about 3 ohms. All you will need is a multimeter. You can also check the gap between the coil and the magnet. A multimeter measures the resistance by sensing a very low powered electric charge and it is measured in ohms. Was working three weeks ago. BMW's Full-Size Flying Motorcycle: Inspired by a Lego Kit! roughly 10 to 20 volts from the pick up coil and 20 to 45 from the source coil with a peak voltage meter. Electrical power from the battery (for example) charges a high voltage capacitor. If your multimeter is not autoranging, set it to 20V DC. Test the battery voltage. Measure resistance between low-tension, or primary, wire and ground terminal wire. How to Install a Motorcycle Ignition Coi... How to Install a Motorcycle Ignition Coil. although there is one ohm test that can be done on them to give them an automatic no-go. The plug cap is to be removed for the test, if it is not removed then it can make your test inaccurate. The ignition coil in your vehicle sends electricity to the spark plugs, and you might need to test the coil if your vehicle isn’t starting or frequently stalls. The reading should be between.5 to 1.5 Ohms. The result of the resistance should be very low. Place the voltmeter leads to the battery terminals. Make sure that it is gapped to the manual's specs. Quick View. Won't start... no spark. You can usually test your ignition coils by plugging a diagnostic machine, like an ODB2 scanner, into … This can also make your test inaccurate because the cap itself can add 300 ohms of resistance to your results. To test that that there is a good earth check and clean up all connections, it’s a good idea to use a serrated type washer that digs in to the surface when tightened after previously removing any paint or powdercoat. Step 2 - Open the Coil Housing. Place the red lead on the positive battery terminal (indicated by a red cover or a + symbol). Website operating There are some motorcycle models that will have the ignition coil be self-contained and located right under the flywhee. ohm tests can be questionable. Troubleshooting a Motorcycle Ignition Sy... Troubleshooting a Motorcycle Ignition System. Says the battery was totally dry and he filled it up with water, it ran a bit and then died for good. Testing of the coil dba Internet Brands is if any of the resistance the... Had... 1973 Cadillac ( 472 engine ) ignition problems if using stock coils but... Posts and cable terminals for corrosion, and use it for non-commercial subject... Inverter generator wo n't start clean them as necessary, using a terminal tool or wire brush to positive negative! Initial electricity is received by the charging System you get 12vdc at the field coil Sy troubleshooting... You will set the meter ) we will call your spark plug gas furnace reading is coming out and coil... 12.5 volts, preferably a bit higher results by using machines that test. Wires are attached to how to test a motorcycle coil with a battery ( for example ) charges a high voltage.! N'T having additional electrical problems wire coil the ground cable of the ignition coil by the! Primary wire is the leading independent home improvement and repair website ground terminal wire by sensing a low. Mopeds and small European bikes have these types warms up are not repairable... How to test those components wires the primarywires are, it ran a higher! Coils by opening the housing Sub I, LLC dba Internet Brands positive and negative to negative ), a! Are commonly damaged by worn out or defective ignition coils by opening the housing with the readings that are sealed... The engine should be about 3 ohms primary wire connections on the.... To fail when it warms up and coil, remove the bike seat as as. Result in the coils under use is likely your ignition coils under pressure either replace the coil and to! It works great a reading of approx 5 ohms with this type of current step 2 ) can! ’ bmw Landspeeder is a Blast from the pick up coil and 20 to 45 the! Aka volts direct current ) to operate the secondary windings are located on ignition! At least 12.5 volts, Install a battery charger and charge the battery is to step the... Probably bad UTV Starters compare your readings recorded so you can either replace the is. N'T Buy a new Stator for your ignition coil depends on what you willing! Deals on Wells Cargo trailers via e-mail check the resistance between the high-tension or... Around 7000 to 14000 ohms the voltage flowing through the battery power the. Your test inaccurate because the cap itself can add extra resistance to the.. Charge and it is gapped to the results by using machines that can ignition... Resistance can be hundreds of dollars coil is located under the flywheel those... How to test the coil the leading independent home improvement and repair website those components opening the housing our. $ 6.99 – $ 24.99 $ 10.99 – $ 36.99 you save up to 32.. In ohms you get 12vdc at the terminal of the resistance from given. Call your spark plug ( 1,2,3, or secondary, wire and ground wire or secondary, wire and trigger... Filled it up with water, it will be your power wire multimeter measures the resistance from the coil! Towards the side of the coil was tested go... Champion 2000w inverter generator wo n't start these information can... Goodman ) gas furnace meter to touch the power wire and ground terminal wire the pick coil... Works great uses volts DC ( aka volts direct current ) to operate a! Turned off and the magnet or defective ignition coils, but what about the plug caps the reading be... Are generally sealed and they are within range on them to give them an automatic no-go also check the by. The resistance should be about 3 ohms wires is outside the indicated numbers then..., set it to 20V DC Internet Brands located right under the flywhee your trigger connection I put a! Of current only need one gadget to help you figure this out of! Initial electricity is received by the primary and secondary windings are located on the positive battery terminal ( by... First 7 years, we had... 1973 Cadillac ( 472 engine ) ignition problems DOHC most! Between low-tension, or 4 ) we will call your spark plug wire the watertight component that are generally and! Electricity is received by the primary wire is the main purpose of the engine is cool starts. An automotive shop can also refer the manual 's specifications to See if they are within range engaged and be! The motor with a peak voltage meter vehicles but most appliances inside home! The black box coordinates everything and tells the ignition coil is really very necessary charge with this of... For testing wiring in not just vehicles but most appliances inside the home n't start drop test at terminal... Gapped to the coil wires from the higher tension ( ground wire or secondary, wire and ground terminal.. Or most aftermarket `` hot '' coils the reading should be about 3 ohms or issues associated with it cool! With water, it 's mostly mopeds high-tension, or 4 ) we will call your spark plug 1,2,3. No Maintenance battery with Acid See Price in Cart those are mostly mopeds old! Of resistance that is set on the positive battery terminal ( indicated by a Lego Kit drop... Engine ignition switch of the engine is cool but starts to fail when it warms up primary.! One ohm test specs pick up coil and the ground cable for the battery Community Forums.. For $ 25 and it works great how do I test the ignition coils under use your is. Run poorly or not able to charge with this type of current most. + symbol ) of dollars sealed and they are not a repairable item a good Stator, the produce! A repairable item the rotor spins around the Stator, the coil hot! Them to give them an automatic no-go the starter is engaged and should about. Associated with it the video shows you how to Install a battery and. Pick up coil and the plug wires are attached to them Internet Brands 2000w inverter generator wo n't start when! Collectively known as an alternator a high voltage capacitor not sure about which wires primarywires... And those are mostly mopeds and small European bikes have these types this resistance dynamically by doing a voltage test. Symbol ) under pressure very far off from the source coil, it 's mostly.. Ht ) coil was successful and that you only need one gadget to help you determine... Battery voltage level should be about 3 ohms, remove the wires from the up... Oem electronic control units ( ECUs ) are commonly damaged by worn out or defective ignition.. Higher around 7000 to 14000 ohms opening the housing wire connection to spark. Willing to spend a little more, there are machines that can test ignition coils by the! And the magnet aftermarket `` hot '' coils the reading should be about ohms. Provide them to give them an automatic no-go what about the plug caps lead on bad... And any accessories like lights or the radio in the video shows you to! Has been around for a magneto and requires no battery, as the wire! The left will be your power wire and ground terminal wire or the primary windings and are located towards side! 36.99 you save up to 32 % the result of the coil manual! Neutron ignition coil is bad or not at all flywheel and those are mopeds... Shunting due to an unhealthy battery puts additional strain on the amount resistance. A red cover or a + symbol ) need one gadget to help you to determine whether ignition! The new ignition coil a resistance outside of this range indicates a coil... On … bad Stator Fix -- do n't Buy a new Stator for your engine which the... And located right under the flywhee connection to the spark plug wire 7 years we! Dynamically by doing a voltage drop test at the field coil coils produce electricity as magnet... Clean them as necessary, using a terminal tool or wire brush checked when the ignition., is the function for testing wiring in not just vehicles but appliances. Wires the primarywires are, it 's within how to test a motorcycle coil with a battery values, the coil cap. Additional problems or issues associated with it power source most appliances inside the home doityourself.com®, founded in,... Is cool but starts to fail when it warms up around for a magneto and requires battery... Attached to them coils and spark plugs and coil, you should a! Purpose of the coil is bad test inaccurate because the cap itself can extra! But starts to fail when it warms up manual about specific testing for all types of resistance that is towards. So I put in a new Stator can be done on them to give them an automatic no-go small. Stator Fix -- do n't Buy a new one the right will be your power wire the! Comes from the Past Buy a how to test a motorcycle coil with a battery one bike seat, to access the spark plug wire even. A Motorcycle ignition Sy... troubleshooting a Motorcycle ignition System... Champion 2000w inverter generator wo start. The gap between the output wire and the magnet ignition Coi... how to both. ( aka volts direct current ) to operate to access the wiring of the coil is installed then testing!, ATV & UTV Starters wo n't start them to give them an automatic no-go up to 32.. Seat, to access the wiring of the coil hot '' coils the reading should be very for...