Just wondering if anyone else has encountered this. When I turn on my headlights, the doors open but the normal and hi-beams do not work. The flash function works and both lamps, hi and low come on. Also if I turn twilight sentinel on both headlights come on as advertised. Thanks.

 

If s device ain't got power at all, it's sure a lot easier than checkin' for correct voltage.

Since BOTH lights don't work, you know it's not a faulty ground at one headlight.

Find out where power splits off to go to the two lights from one point (maybe the headlight switch itself - check the wiring diagram), but the split-off point is where you gotta' start checkin' for power absence, when there should be power.

Follow the wire UPcurrent till you find the problem.