Constantly Burning out bow light

[Basketcase]

Originally Posted by NoBones

You have a poor connection or a bad spot in the wire that runs from the ground
or from the hot that comes from the switch..
Check and re-do all connections IE: switch and splice from wire harness
to the Perko !! NO butt splice !! Only solder and heat shrink for your
connections.

I'm trying to wrap my head around this and I can't figure this out. A poor connection in the circuit will lower the voltage on the circuit, yes? How would that blow the bulb?

I too solder and shrink tube all connections but if you do, you need to make sure they are properly supported afterwards or you may end up with wires that break right where the solder ends due to the constant movement of being on a boat. I like the adhesive wall shrink tube. If you must crimp, use high quality connectors and a good crimp tool. Most people don't own a real crimp tool, and a soldering iron is much cheaper.

Edited because one of my statements made absolutely no sense.