caddy tails

ihave the e86-93 lights and we are wiring everything up.found that when applying brake, front turns come on. my buddy is a good electrical guy and he says he may need to put in some diodes. did anyone else have this problem?

a diode is a ONE way piece for current to flow one way and not back..i had them on my s10 and wired them and didnt have any problems

I had this problem when the back got bagged. Found out it was a ground that wasn't grounded in the wires for the tails.

maybe with finding one wire that was corroded, maybe that will fix the problem. i never checked it