Blowing fuses on 07 BMW G650

[ARMA]

I seem to be blowing fuses on my X-country. It's Fuse c, a 7.5w mini thing that protects the instruments, brake light and "diagnostic plug" according to my book. It only seems to happen when I start or stop the bike. I have had the front apart lately but the instrument panel has not been played with. I pulled it today, it's dry and clean and nothing looks harassed. The Diagnostic plug is an unknown element because it could mean anything. There are dozens of them on a modern bike. I doubt it's the ABS because that system has a separate set of fuses for some reason. I have just put a new exhaust on so suspected the O2 sensor but that looks fine too. It has happened twice. Once as I pulled up and once as i pulled away. This makes me think it could be the brake switch. Testing reveals the front switch is not making the red light glow redder so for now I've disconnected it. I fitted a slip on can, the front pipe was unaffected so can't see how it could be that. She had an MOT a few weeks back and the sensors were all fine then. I'm dubious to play with it because I can't get any spares until the morning and I need to use it early for a trip. The front brake pads are low, they are in the post and t is the front switch not working. Surely it doesn't have a sensor for low brake pads?
Any ideas?

Cheers

 

[shugie]

Can you find the diagnostic socket, it's under the right side panel on mine, if it had water in there it might be shorting the circuit enough to blow the fuse. I think that there is only the one.

 

[ARMA]

Thanks for replying. Is that what they meant by diagnostic plug? Well mine is as dry as a bone but will follow the wires right back tomorrow. I have to remove the "tank" anyway in the afternoon so will trace it through. I'm leaning towards the brake switch but i'm using logic and reason and that doesn't always prove to be effective with bikes and women.

 

[shugie]

Thanks for replying. Is that what they meant by diagnostic plug? Well mine is as dry as a bone but will follow the wires right back tomorrow. I have to remove the "tank" anyway in the afternoon so will trace it through. I'm leaning towards the brake switch but i'm using logic and reason and that doesn't always prove to be effective with bikes and women.

If the diagnostic socket is fine, then I think you are probably right to suspect the brake switch, if one of the wires from either switch is damaged and rubbing against the frame, then when you activate the switch the fuse could go. Try following the cables along from both brake switches, especially in any area where you have been working recently.

 

[ARMA]

Thanks for the replies. Logic prevailed and I found the problem today. Worth noting that where the brake switch line traces through from the bars to the "tank" the cable had got caught and had cut itself off, rubbing against the frame in a full-lock left turn which I had only done pulling away or pulling up. Might be worth checking yours out, mine was really tight so I've rerouted some cables and it plays fine now. Easily fixed with a cable tie if you get it before yours cuts.