Hi! I had a problem with my goat a month ago when the turn signal light fuse blew. I took it to the dealer to check it out and they said they didn't find a bad circuit and replaced the fuse. It worked fine on the way home. I started the goat up a couple hours later and the fuse blew again. So I went and got me 10 fuses, replaced the blown one and tried it.
The right side signals worked fine, but when I turned on the left (driver's side) signals, I heard like a vibrating noise coming from the fuse box (underneath the steering wheel) and the fuse blew. I took the left taillight out and checked the bulb and the wiring. The bulb looked fine to me but one of the wires had black spots on it but I couldn't see any other damage to it. I put some electrical tape around the wires and tried it again and it worked fine.
For 2 weeks. Then it blew again

I replaced it and the lights worked for 3 weeks until it blew again just last weekend

What the heck i is that? On the days that this happened it was always nice weather, no rain. So I kinda ruled out moisture to be the problem...

Does anybody have an idea?
Thank you