Help No Low Beams Urgent. (1 Viewer)

[jda81]

So the other night I came home and my lows worked just fine the next morning nothing. All of the marker lights and the highs work just fine. The relay clicks right the fuses are good and I have power to the fuse but nothing at the lights. I leave town for work tomorrow and need to fix this right now

 

[scottryana]

Did you check the bulbs?

 

[thedoughboy]

Do you have a Slee Harness?

 

[jda81]

I'm a dumb s*** thanks. I've never had 2 go at once before well I guess that is a good reminder that the simplest solution is usually the right one.

 

[DWHeigher]

A friend of mine had thi happen on his 91. It endedup being the vltage regulator in the alternater. The voltage went up and blew out several things in the truck. Make sure your alternator voltage is within spec.

 

[Dave 2000]

Most common failure relating to the headlights on the 80 is the pair of relays (normally 1 black and 1 brown), check they are ok and also check the fuse box where they are plugged in, often burnt. You may hear clicking but that is the relays swapping over i.e. first brown and then the black IIRC.

regards

Dave

 

[tenmile]

I have the same problem, though it is intermittent. I just have a brown relay in the fuse box, not a black one, 1997?

 

[tenmile]

I was optimistic it was the bulbs, tested the volts at the bulb-plug, the volts were good. Replaced the low-beam bulbs and did not light up????

 

[Tedward]

I think there is a ground wire on either side. Each side goes to a small bolt on the body. May not see it with the battery and the washer bottle installed.

 

[tenmile]

I took apart the ground, greased w/ dielectric, put back together, and it works now. Thank you.