Prostar marker lights

[barf]

I missed the part on your first post that said your tail lights were still on. Probably not a short to ground, probably bad connection or broken wire making intermittent connection. A nightmare to diagnose!

On my truck I had an unsecured wire on the tail light rub through to ground. It took me a long time to figure out no fuse, have to cycle key to reset circuit. Doesn't sound like this in your case.