there maybe a sticky on this but i didn t see one. so here is my problem my truck lights will go off if running the brights but not if running dims i have replaced headlight switch it fixed it for awhile but now it is back what to do

 

Sounds like it's time for a conversion to the headlight relay system. There may also be a problem with your "Combo Switch" that controls your change from high to low beams and wipers. Do a search for headlight relays for that conversion. When I replaced my combo switch it was not all that expensive from the "Dreaded Dealer"

Bob