fuse keeps blowing HELP
Elite HDF Member
Joined: Nov 2010
Posts: 3,846
Likes: 173
From: Simi Valley, CA
Most likely a wire with compromised insulation resulting in a dead short. I'd start tracing the headlight wiring looking for the damaged area. An ohm meter can be of help in isolating the actual wire where the problem exists.
Last edited by 2black1s; Oct 2, 2012 at 12:37 PM.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
examine the fuse- if the fuse media is splattered and black soot is inside the housing, you have a short circuit.
if you bike is lowered the rear tire may have chewed up the wiring to the tailight.
if that is ok,
pull the bulbs out and test again.
you have to work through methodical- if you are not good with electrical, get a Pal to help.
electrical knowledge is required, not specific motorcycle knowledge
mike
if you bike is lowered the rear tire may have chewed up the wiring to the tailight.
if that is ok,
pull the bulbs out and test again.
you have to work through methodical- if you are not good with electrical, get a Pal to help.
electrical knowledge is required, not specific motorcycle knowledge
mike
Last edited by mkguitar; Oct 2, 2012 at 12:59 PM.
Road Warrior
Joined: Jun 2008
Posts: 1,437
Likes: 80
From: currently an Okie
Ohm meter
The thing to remember is that if you try to ohm out the hot wire to ground on a lighting circuit, you will read very low resistance because of the light bulbs. Unplug your headlight and remove all the bulbs on the circuit to make it a lot easier.
Road Master
Joined: Mar 2010
Posts: 934
Likes: 54
From: SE Wisconsin
I'd start with the easy stuff first, bulbs, sometimes they can blow in a funny way that creates a dead short. Pull them all out and see if short is still there, if it is, I'd look closely at the wires starting with the tail lights from under the fender and around seat looking for a chaffed wire.
Stellar HDF Member
Joined: Jul 2010
Posts: 2,275
Likes: 241
From: Highlands, NJ
I had a similar prob with my RKC. Wire behind the headlight had the insulation rubbed off by rubbing against the head tube. Shorted out the circuit.
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