1998 12v 3500 headlights flash on high beam now staring to do it sometimes on low beam new switches and wiring harness. have to leave monday night road trip. any fixes or by pass factory wiring help please gotta pull 38ft camper in dark

 

Does your truck have the daylight driving lights??? If it does that module under the hood likes to burn out and will do really strange things to your headlights...

 

Thanks for getting back with me I believed it is wired for them but i do not have the lights themselves in bumper

 

Opps...A little bit of mis-understanding......

In Canada we have daylight driving lights...They come on at a low voltage to the headlights when you first start up the truck...When it gets dark you pull the headlight switch and you have full voltage to the headlights..We have a law in Canada,that vehicles have their lights on during daylight driving..


If your truck was built for the US market,then it shouldn't have the daylight driving lights,unless it was a Canadian truck imported to the US.



To check...Under the hood,bolted to the drivers side inner fender would be a black box about 4x4 inchs with one large plugin...If that box is not there,It's a US built truck.


Sorry for the confusion....