[playinw/1stgen]

I have a 92 cummins it had a utility bed on it a while back. I put a regular dually bed back on it tried using the factory tail light plug and nothing works. Checked the bulbs and there fine. I'm not getting any power to the wires. Checked the fuse under the dash they are all fine. I'm not positive the lights worked before but know they don't work now. This truck is a wiring nightmare so I don't even know where to start. Any help would be great thanks

 

[redneck733]

Check your ground. Run a wire from the frame too the bed.

 

[Longisland24v]

There a fuse under the hood that controls all that too ,happen to new I searched and searched and pulled all the fuses to see that there on under the good I believe it was a 15 amp

 

[sls001]

If you don't already have one I strongly recommend you purchase a Factory Service manual (FSM). With it you will have all the wiring diagrams necessary to track down the issue.

You can get one here: Dodge Cummins Turbo Diesel Parts and Accessories - Geno's Garage


I checked I don't have a digital copy of the wiring diagram I could share but I'm certain someone here can post one or point you to one to get you going.

 

[Philip]

93 wiring diagrams. They should be the same as your 92.

http://www.cumminsforum.com/forum/89-93-tech-articles/352624-93-wiring.html

 

[playinw/1stgen]

Ill have run a wire from the frame to the bed like suggested. I also tried to replace every fuse and relay that I could find and it didn't help. I also tried to figure it out for hours today and the only thang I could come up with is wanting to light it on fire. I tried cleaning every ground wire that I found and nothing. I have a fsm but the only thing worse than me trying to fix wiring issues is me trying to read wiring diagrams. Thanks for the responses I really appreciate it

 

[simplysmn]

Maybe a headlight switch ?for running light's and as for brake light's check the brake light switch up by brake pedal. then turn signal's do they even come on ? if not then there again turn signal switch .

 

[AFRenoughsaid]

Agree with ground I had to put new grounds on both tail lights when I had my 1st gen

 

[playinw/1stgen]

The headlights come on. And the front blinkers work but they are very light weak blinks. It also has cab lights that I haven't messed with yet but when they blinkers are on 2 of the middle cab lights start blinking very faintly also lol I have no idea what's goin on with this truck.

 

[simplysmn]

OK you have a Ground issue. If light's come on but are dim then you have a major ground problem even look under dash to make sure the 1's down under are tight .

 

[playinw/1stgen]

A ground would cause all this headache? Geez
This might be a really dumb question but is there a place to start cleaning grounds or is it just a needle in the haystack deal?

 

[redneck733]

Check the plug under the dash.The plug is just befor the wires go through the firewall

 

[93redgoat]

Man I had all these crazy problems too. I had weird lights issues. I had gauges fluctuating when I turned on a blinker NIGHTMARE. I started from scratch. Re grounded everything starting at the battery to frame to engine to firewall to main dash ground posts back to frame to bed. You can't over ground. It was a pain but solved ALL my problems
And make sure your hazard button on the column is DOWN. I worked for hours on taillights to learn (from this wonderful forum) that if the button is up you have no BRAKE LIGHTS.
It's all repairable!!!