Headlight switch ??

[DThibault]

My 93 W350's marker lights, tail lights and dash lights all went out today. I checked the fuse and all is OK, The horn which is on the same fuse still works. I tried to trace some of the wires here and there and the spaghetti mess has me frustrated. Should I try changing the switch first. Please advise. Thanks.

 

[PBJ2500CTD]

A switch is relatively cheap and easy to change. First thing to look at would be the light switch plug. If it is crispy (burnt) then a new switch and possibly a plug would be in order. If you tow a lot with a trailer that has a lot of lights you may also want to re-wire and add a load relay.

 

[DVolk]

Is the breaker bad ? Ive had the head lights on my 92 go out and come back on after i shut them off and pulled them back on its done it a few times but worked with no fail for a long time afterwards never could figure out a reason .

 

[DThibault]

Head lights work fine and I did the trailer light relay thing when I rebuilt the truck a couple of years ago. I have an old switch in parts and will try it. Then order a new one if all this works. Thanks for the help.

 

[tugboatphil]

I went to the dealer several years ago for a switch. They wanted an unbelievable price for a 93. I asked about one for a 94, as there was a thread about switching them and a couple of color wires that were different.

The 94 switch was less, but there was a switch upgrade kit for a 94 that included a relay, wire extenders and a plug end. The kit was cheaper than just the switch. Sorry I don't remember the part number.

If all else is too expensive you can get a cheap switch for about $20. It would tell you if that was the problem.

 

[cerberusiam]

My 93 W350's marker lights, tail lights and dash lights all went out today. I checked the fuse and all is OK

IIRC a fusible link is bad. The dash lights and tail lights are on circuit powered thru a seperate fusible link.

 

[DThibault]

I didn't get a chance to look at it this weekend. Where is that fusible link? On the fender well on the drivers side. I see a few there. Which one is it? Thanks for all the help. I'll figure this out this week I hope, Almost inspection time.

 

[DThibault]

I had some time to take a look at the switch yesterday. We had a weekend Christmas party and many relatives spent the night. None of them get up in he morning and the shop was still warm and I was looking for a place to hide. Anyway that bugger was a pain to get down far enough for my little farmer hands to get a grip on the clips. I finally got them off, examined the switch and found no burn signs, then put the used switch I had on. Very happy to see the proper lights come on when I reattached the battery. Thanks for the guidance. I also replaced an axle ujoint in preparation for the snowstorm that is not coming anymore. Had to be done.

 

[RSchwarzli]

Glad to hear it is working!



Also for those that may read this thread in the future, if you can, get a good condition factory headlight switch from a wreckers and not a new one from NAPA, Autozone etc. I did that for the crew cab and noticed the cheapness of everything on the brand new one. I never did use the new one. I have it still sitting in a box on my parts shelf. I got one off a wrecked truck. The old ones are much beefier. Just make sure to put a relay in if you want it to live a long life! WAAAAY to much juice going through it if you have more than the factory lights!