headlights dont work.

my brother in law has a 94 chevy 1/2 ton 2 wheel drive 4.3. he says his headlights quit working. he has parking lights and interior lights. he changed both headlights and headlight switch and still dont work. what do we look for next?

well since you didnt say it and im sure you did look but check the fuse cause im pretty sure the headlights are on a seperate circuit than the parking lights then if thats fine since it is a 94 its possible that the wire insulation could have rotted away and shorted somewhere if you have access to a multi-meter check for voltage on the end of the line and for voltage at the switch since its a new switch if you hve voltage at the switch and none at the headlight your looking for a broken wire

Red

Could also be the hi/low switch?

kinda wierd but he said they started working when he turned his blinker on yesterday. does that mean that the hi/low switch is wore out? or was it just stuck in between hi and low?

Well at least you'll know were to start next time it happens.