Keep Blowing 12v Accessory Fuse
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Road Master
Joined: Aug 2010
Posts: 755
Likes: 57
From: St. Augustine, FL
Keep Blowing 12v Accessory Fuse
I blew my 12v accessory plug fuse twice today. It happened once before, several months ago. I do have my Hogtune amp remote lead tied into it and I always keep my mp3 player plugged into it, but other than these incidents, it has never presented any issues. The only thing that all three incidents had in common was that they occurred when it's hot outside, but other than that there's no rhyme or reason.
Would heat in the fairing cause an overload that would blow a fuse? Would it be safe to bump the fuse up to a 20 from a 15 since it's only an accessory outlet?
Would heat in the fairing cause an overload that would blow a fuse? Would it be safe to bump the fuse up to a 20 from a 15 since it's only an accessory outlet?
Tourer
Joined: May 2009
Posts: 444
Likes: 2
From: St. Paul, MN
I agree. I think you may have a pinched or chafed wire which is causing a short to ground. The remote turn on lead to your amp plus using an mp3 player should not pull over 15 amps and blow the fuse. I'm not a big fan of upping amperage in fuses. That can overheat wires and lead to a bunch of other problems. I don't think it would solve the issue in your case.
I would start off by retracing your amp turn on lead and make sure it isn't rubbing on anything metallic inside your fairing. Just a tiny spot worn through is enough to short it. The other thing would be to then check the hot lead to your cigarette lighter and trace it all the way back to the fuse panel looking for the same thing.
I would start off by retracing your amp turn on lead and make sure it isn't rubbing on anything metallic inside your fairing. Just a tiny spot worn through is enough to short it. The other thing would be to then check the hot lead to your cigarette lighter and trace it all the way back to the fuse panel looking for the same thing.
Road Master
Joined: Jan 2010
Posts: 881
Likes: 13
From: ONT
I definitely would not increase the size of the fuse. If you have the documents that came with the amp, you should look up what the manufacturer says the Full Load Amperage drain for the Amp should be. I would take an "amp probe" and confirm the draw on the circuit is less than 15 amps with everything on that circuit you use turned on. Also see what the Amp is drawing by itself and confirm it is within spec design. If you are close to the limit, an increase in ambient temp can cause the fuse to blow. Also if the amp is using more current then it supposed you are that much closer to finding your problem. Having mentioned the above I am more of a mind that you have a short. Maybe a nicked wire that comes into contact with your frame every once in a while. Bad or loose connections can also cause a fuse to blow. I would tend to believe it is more than likely on the amp. Try wiggling wires and connections with the iginition and accessories turned on to see if you can make the fuse blow. If it does you have narrowed it down and can trouble shoot from there. Make sure you made proper connections under your seat and on your amp itself. Check all these connections and make sure they are tight. Look for signs of burning or sparks as you move the wires etc. If you don't find anything there move to where the wire harnass goes into your fairing. A small nick in the insulation can be enough to cause a short every once in a while if it comes into contact with the frame of the bike.
Good luck. Electrical problems that come and go can be some of the hardest problems to find and correct.
Good luck. Electrical problems that come and go can be some of the hardest problems to find and correct.
Road Captain
Joined: Apr 2009
Posts: 728
Likes: 25
From: griffin ga
mine did the same thing one time.... but only one time..right after I installed the hog tunes speakers & amp..my bike only had about 500 miles on it when I did the install,,, I searched & search for a wire issue.. couldnt find anything.. it has never done it agin...been working for 2 yrs now never had any more issues... dont know what happened.. the amp wires straight to the battery for power only the acc. curciut for a remote turn on .. if you find out why let me know..
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Road Master
Joined: Aug 2010
Posts: 755
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From: St. Augustine, FL
Well, I took off the batwing cover today and checked out all of the wiring. I traced the remote lead wire back to the amp and didn't see any exposed wire or even any areas that looked "rubbed" at all. I also traced back the accessory hot wire to the point where the insulation begins and runs off into the main harness, but again I didn't notice anything wrong. Just to be on the safe side I wrapped some electrical tape around all portions of any slightly exposed connectors and I also lifted the amp wiring up away from the fins on the HK radio just in the off chance that the vibration is causing them to rub against the fins. We'll see what that does for me.
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Cruiser
Joined: Jan 2007
Posts: 239
Likes: 4
From: Province of Ontario
I went through the same thing and it almost drove me to distraction. I finally found that it was a chafed wire around the area that I had wired in the gps on the aux circuit. It would not blow the fuse right away but over time and with running over the road it would happen. The rougher the road the more likely the fuse blowing out.