RepairPal is your advocate for car care advice and guidance

Q: My 15 amp ECM Fuse Blows When Itry starting my Harley-Davidson Motorcycle on 1995 Chevrolet G Series Van (G30)

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My ECM Fuse blows everytime when I start the engine after a short stop, like when filling up the gas tank or starting it within 15 minutes after turning the enging off. If I wait 40 minutes or more when the engine cools off, it starts.
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
Sounds like something is heating up and grounding a power circuit to your ECM. There have been some issues with the Dash wiring harness in the GM trucks. I checked the bulletins for harness problems and there are several, but nothing that says there is a magic bullet for any particular problem, other than they have issues with their wring looms.

here is a link to an online repair manual site, where you can obtain the wiring diagrams for your Van. What I would do is trace all the power sources, in the wiring diagrams for that ECM fuse circuit, there must be something that heats up and allows a hot circuit to touch ground. it could even be an internal circuit to the ECM Do you have any after market electrical devices? That may be a key to your problem, as well.
Thank you, the Harley dealer is analyzing the possible cause. I do have an upgraded stereo system installed, but I've always had that done on all of my bikes in the past with no problems.
Didn't find what you were looking for?