Main Motorcycle: 2010 Bonnevill T100
Join Date: Mar 2010
Location: Leduc AB., Canada
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Is it possible that something is wired wrong? That would be the only other thing I could think of. Something is allowing current to flow directly to ground BEFORE the load- which is the bulb. A short to ground after the load would just be fine as the circuit must return to ground at some point. Hope you find the issue. Shorts can be tough to locate sometimes but are relatively straightforward as far as the technical aspect goes.
Well there are only 3 wires. One is a ground with a connector on it to be grounded to the frame or some such thing (I chose the battery for testing) and two other wires going into the tail light. Get those two wrong and it just doesn't work.
Very confused and disappointed with this whole thing.
Grounding direct to the battery is as good as any other method and makes no difference.
I take it that you had the lens off the Lucas light and the bulb out during fitting? If so, check out the little contact board at the bottom of the bulb holder. It is possible for the spring to push this out, and in replacing it, it becomes rotated. There should be a small tab on it that engages in a groove in the side of the bulb holder, which gives it correct orientation, but the tab is such a loose fit in the groove. Also make doubly sure that the spring is clear of the contacts, since this could ground one of the bulb filaments, blowing the fuse. Hope this helps, there have been a couple of these cases on here just recently.
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