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Stage I
Joined: Jun 2025
Posts: 7
Likes: 4
From: UK
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Hi guys. New on here, so if i'm on the wrong page, my apologies.
Recently bought a 2002 CVO Dyna that is in need of a little cosmetic work. It's been fine until i parked it up before my holiday. 2 weeks after the holiday, i got it out of the garage and it turns over etc etc but does not fire. I've put new Screamin Eagle leads and plugs, but still no spark. Is it possible for a crank sensor or ignition coil to stop working suddenly ? Anybody tell me how i can check the ignition side of the coil, as mine has a 3 pin plug attachment, not the 2 wire type. I've checked across the Primary leads and am getting 12000 ohms, but need to check the coil side. I have 12v to the centre pin.
As i say, it does everything it should, but won't fire up (spark). It was fine when i parked it. Any help gratefully appreciated.
ps New fob battery and 12v battery on the bike.
Recently bought a 2002 CVO Dyna that is in need of a little cosmetic work. It's been fine until i parked it up before my holiday. 2 weeks after the holiday, i got it out of the garage and it turns over etc etc but does not fire. I've put new Screamin Eagle leads and plugs, but still no spark. Is it possible for a crank sensor or ignition coil to stop working suddenly ? Anybody tell me how i can check the ignition side of the coil, as mine has a 3 pin plug attachment, not the 2 wire type. I've checked across the Primary leads and am getting 12000 ohms, but need to check the coil side. I have 12v to the centre pin.
As i say, it does everything it should, but won't fire up (spark). It was fine when i parked it. Any help gratefully appreciated.
ps New fob battery and 12v battery on the bike.
Cruiser
Joined: Apr 2025
Posts: 163
Likes: 85
From: Okanagan Valley, British Columbia
Sorry Im only beginning to learn about Harleys, but on cars CPS and ignition units can fail immediately. In fact I think with electronics its common for units to fail without warning.
Seasoned HDF Member
Joined: Mar 2021
Posts: 18,272
Likes: 3,684
From: backwoods
Pull the connector at coil center pin should be 12 volts. Pin one of black connector on ignition should have power. white with black wire. This is the same wire that goes to date link connector. You can check there. Doesn't guarantee good everywhere
Myself I would replace the crank for the hell of it at some point, it may or may not be orginal. Use a piece of weed wacker line to pull old one through loom and then new one back.
Myself I would replace the crank for the hell of it at some point, it may or may not be orginal. Use a piece of weed wacker line to pull old one through loom and then new one back.
Thread Starter
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Stage I
Joined: Jun 2025
Posts: 7
Likes: 4
From: UK
Pull the connector at coil center pin should be 12 volts. Pin one of black connector on ignition should have power. white with black wire. This is the same wire that goes to date link connector. You can check there. Doesn't guarantee good everywhere
Myself I would replace the crank for the hell of it at some point, it may or may not be orginal. Use a piece of weed wacker line to pull old one through loom and then new one back.
Myself I would replace the crank for the hell of it at some point, it may or may not be orginal. Use a piece of weed wacker line to pull old one through loom and then new one back.
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Seasoned HDF Member
Joined: Mar 2021
Posts: 18,272
Likes: 3,684
From: backwoods
You should only have 12 volts at the center. I believe the other two are sent grounds to fire from the module. Did it ever run for you?
TSM also sends a ground to the igniton module on pin 10 to enable spark. Then you got MAP and CPK. The CPK sends back an AC signal. check it with the plugs in. Not sure what it should be. Myself, I would tempted to replace CPK,. It is not all that expensive. Coils are a little bit more. But my 2001 at 90k is on its 3rd. My 2007 I replaced at 70k when I had the tank off. Different design, not sure of that makes a difference.
I'd probably do the coil too. I realize easy to spend other peoples money. But it could be 20 years old.
TSM also sends a ground to the igniton module on pin 10 to enable spark. Then you got MAP and CPK. The CPK sends back an AC signal. check it with the plugs in. Not sure what it should be. Myself, I would tempted to replace CPK,. It is not all that expensive. Coils are a little bit more. But my 2001 at 90k is on its 3rd. My 2007 I replaced at 70k when I had the tank off. Different design, not sure of that makes a difference.
I'd probably do the coil too. I realize easy to spend other peoples money. But it could be 20 years old.
Last edited by Rounders; Jun 25, 2025 at 06:33 AM.
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Seriously though, trouble shoot the issue and only replace what’s defective.
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Joined: Apr 2013
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From: Cape Cod
You dont think right!
