Electrical Issue... - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 4 (permalink) Old 05-11-2011, 10:46 AM Thread Starter
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Electrical Issue...

Just went and bought myself an 01 RC51. I put about 200 miles on it, then yesterday while riding, i brought the front end up slightly, set it down and the bike died. It wouldn't prime, and the power commander didn't turn on when i turned the key, so i checked the fuses under the seat and sure enough, the 30 amp fuse was blown. (pretty sure it's the main harness fuse) I changed the fuse, drove a couple blocks to return the tools i borrowed, turned it off, then back on, and got down the street 2 blocks and it died again. I put one more fuse in and as soon as i turned the key this time, it blew again. So i pulled the tank off, and the clip for the fuel pump pulled out pretty easily, so i snapped it back together and replaced the fuse again, and then it worked fine. I jiggled all the wires and repeatedly turned the key on and off, to see if i could get it to fail, and it didn't. I put the tank back on, and took it down the street, pulled the front end up many times, hit bumps/small potholes. When i got back to the house, my gauges were not working. I pulled the fairing off to get to the fuse box and saw that now a 10 amp fuse had blown. I replaced that, got everything working fine, rode to my friends (10 mile round trip) and everything is working fine. I will take it out further and see what happens, but I'm wondering whether i have a bare/loose wire that could be shorting out, or if i just had two unrelated fuses blow, and the whole thing is a coincidence. Let me know what you think, Thanks!
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post #2 of 4 (permalink) Old 05-11-2011, 02:35 PM
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Fuses generally don't blow without a reason.
Usually due to a short or over-current condition.

As a side note: Be careful when you raise and lower the fuel tank as the wiring harness passes very close the tank edge and can potentially pinch the main harness.

Sounds like the 30A fuse for the ECU was blown first.
It's the one under the riders seat.
The bike's 30A main fuse is located plugged into the starter relay.

The second fuse was the 10A Fuse E for the instrument panel, illumination, and tail lights.

For sure it sounds like you've got a short or pinched wire floating somewhere.
I'd start eyeballing the harnesses and see if you find the culprit.

Has anybody done some "creative" wiring on the bike, like alarm system, LED lights, accessory lighting, etc. that entailed altering the wiring?

Most problems seems to originate from cutting into the wiring.
Next is where damage occurs to the harnesses, such as accidents or the laying the bike down, etc.
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post #3 of 4 (permalink) Old 05-11-2011, 11:41 PM
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Short for sure
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post #4 of 4 (permalink) Old 05-12-2011, 07:49 AM Thread Starter
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The only wiring done to the bike, was LED taillights, for the undertail kit. Just rode over 30 miles, no problems anymore, i must have moved the wire to a spot where it isn't contacting anything. Looks like i'm going to be taking it apart this weekend to find the culprit. Any ideas where to start besides under the tank? Thanks for your input!
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