sometimes when i put my lights on tehy work fine, my parking light aslo,its a 91 firebird, but sometimes they dont come on after pushing the switch a few things such as my int lights stop coming on. i foun that when i push my trunk button it resets? and my interior lights will come back on, seems to me like a short/bad connection but i dont understand wut exactly the problem is, if u have a good idea u should let me know about it.