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Mendicant
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8,437 Posts
Discussion Starter · #1 ·
I was driving tonight, and my headlights turned themselves off. Here is the complete description:

Parking Lights come on in switch position 1 - dash lights too
Headlights, parking lts & Dash lights dont function in switch pos 2
Hi-Beams function in flash mode, but not continuous mode.

Is this an occurance that other people have experienced? Did I burn a relay or the switch? Maybe I can just get by with some contact cleaner or tightening a fitting?

Thanks - thought I would at least ask before tearing apart the truck.

THX
 

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Premium Member
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440 Posts
I had the same problem(8-01) and the dealer stated the switch on the column was bad due to my headlights being aftermarket upgrades.The dealer changed the switch under warranty and I have not had the same problem again.
 

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Premium Member
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4,789 Posts
I am with Jorge, I would check the fuse and relay first by changing them with another ( any auto relay will do they are only $5 at the auto store and it is a good idea to keep a spare), this seems to be a comon problem with the original switches going bad. Jorge if the Dealer said that the headlights being aftermarket upgrades he either has no idea what he is talking about or he was tring to get you to pay for the switch. The power for the headlights is pulled through the relay, the only thing the switch does is turn the relay on and off. The stock relay is good for 30 amps. 30 amps X 12 volts gives us 360 watts 360/2 gives us 180 watts so as long as your headlights are less then 180 watts each you are cool:cool: .
 

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Mendicant
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8,437 Posts
Discussion Starter · #4 ·
Thanks guys, I'll try the fuse first (of course) and they swap out the relay. Hopefully I can get this resolved today.
 

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Mendicant
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8,437 Posts
Discussion Starter · #5 ·
I figured it out - the switch had a meltdown. one of the leads got loose and melted out one of the contacts. I glopped some solder all over it to get the connection back, but I'm going to go to radio shack this weekend and see if I cant rebuild the whole swich with some mica board and new contacts. Thanks for your help guys.
 

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Premium Member
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1,050 Posts
I read the other threads in my search results for "low beam" and this thread seems to be the closest match to what my 90 is having an issue with...

My PS low beam is not working but the DS is. My hi-beams both work in flash and continous mode and all lights (exterior and dash) seem to function normally. Went to pepboys just now and bought a Sylvania replacement headlamp but I'm still without PS low beam on the new headlamp. :(

Could this be the headlamp switch like Jim had an issue with? Any help is appreciated. Thanks.
 

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Premium Member
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4,789 Posts
Nope, if one side works then the switch is working! I would check the connector for the headlamp and if it looks ok then I would fallow it back to looking for cuts in the wire. Since the high beam works that indicates to me that both the ground wire and the high beam wire are fine, so you only need to trace back the low beam wire. Do you have a volt meter? That way you can figure out which wire is the low beam wire?
 
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