havn a problem when i turn headlights on, the fuse blows once i turn headlights on and the only way to get it to stop is pull all the bulbs in maker and back tail lights then it stops until the next morning , so i thought it was headlight switch....... replace headlight switch and still blows switch.need help havn this prob for 6 months helppppppppp.

 

most likely a short somewhere. check your wiring.

 

Put in one bulb at a time and test to see which one causes the blow. At least you can start narrowing it down that way.

 

Its not uncommon for one of the filaments in the bulb to touch the other causing issues .
Any work been done on truck lately , on a lift , maybe wire got pinched .
An other is sometimes a trailer wiring gets shorted for a number of reasons , just rust/moisture .