Dope trying to dope out a signal light issue

[TJ]

Good clean grounds first. For some reason I have found that the 41-48 cars definitely need really good clean grounds. I have even added a ground strap to the housing stud that protrudes into the back side of the fender. If you have a stock wiring harness also check all the bullet connectors at the back . Take them apart and clean them with sand paper and a round file in the tube encased in the rubber.