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Ignition Coil Testing

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Old Nov 21, 2023 | 05:52 PM
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Default Ignition Coil Testing

I have a 2008 Electraglide Classic. No spark. Pulled coil. I have the service manual and do not see primary or secondary resistance information. I am assuming it is 3 ohm. Additionally, not even sure how to test the primary resistance as it has four pins from a plug in connector and I can't get a read on it.
I appreciate any help.
Downtown Sammy
 
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Old Nov 22, 2023 | 04:25 AM
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Post your question here.

https://www.hdforums.com/forum/ignit...-injection-55/

This is the forum software issues.

Been around awhile but only as a suggestion, make your next new post over in the new member welcome area to say hello.
 

Last edited by Jackie Paper; Nov 22, 2023 at 04:27 AM.
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Old Nov 22, 2023 | 07:50 AM
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The OEM coil has 4 connections, 1-front cylinder, 2-rear cylinder, 3-power and 4-ION SENSING. Look in the FSM wire diagrams for ignition to find which connection to use.
 
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Old Nov 22, 2023 | 11:56 AM
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Originally Posted by TexasScooterTrash
The OEM coil has 4 connections, 1-front cylinder, 2-rear cylinder, 3-power and 4-ION SENSING. Look in the FSM wire diagrams for ignition to find which connection to use.
Thank you...I'm going to check it out!
 
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Old Nov 22, 2023 | 12:26 PM
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I have had a bad coil ohm good.
 
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Old Nov 22, 2023 | 01:32 PM
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From: Honah Lee
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See you got moved. What codes do you show? Remember plugs need to be left in to get a spark on ion sensing. Use a new or testing plug.


This may help.





 

Last edited by Jackie Paper; Nov 22, 2023 at 01:36 PM.
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Old Nov 22, 2023 | 02:04 PM
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Primary resistance 1/2 ohm.. Most Ohm meters won't be able to measure that accurately..
 
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Old Nov 22, 2023 | 04:16 PM
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Jackie
thanks for the info. I was able to identify pins and tested primary. Both tested (multimeter) at .5. Range in manual was .5 to 2.5. Definitely on the lower end. Secondary (F and R) tested 6000 so in range. Now I’m at a bit of a loss. Not sure where to go. I could buy another coil and replace to rule it out. Any thoughts?
 
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Old Nov 22, 2023 | 04:27 PM
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From: Honah Lee
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Originally Posted by Downtown04
Jackie
thanks for the info. I was able to identify pins and tested primary. Both tested (multimeter) at .5. Range in manual was .5 to 2.5. Definitely on the lower end. Secondary (F and R) tested 6000 so in range. Now I’m at a bit of a loss. Not sure where to go. I could buy another coil and replace to rule it out. Any thoughts?
Did you read for codes? How are you checking for no spark? With everything together, and cranking what is the voltage at power (A connection Y/GR wire}?
 

Last edited by Jackie Paper; Nov 22, 2023 at 04:33 PM.
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Old Nov 22, 2023 | 04:44 PM
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I need check codes. I tested spark using spark tester. Coil is under tank so pulled it. how do I check for cranking power y/gr? This is new territory for me. Thanks!
 
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