I have a 2000 Dodge Ram 1500 Sport. The issue that I'm having is with the headlights. First or all my passenger side low beam is dim. It is not a bad connection or corrosion. Second, my high beams dont wont. My issue started out with the high beams working, but when I would turn them off, they would stay on. If I turned the headlights off and back on the high beams would be off. The low beams still switched between low and high but the high beams would not turn off. Then out of nowhere the high beams stopped working. The indicator on the gauge cluster turns on and off properly but the high beams don't work anymore. I checked the wires and there is power to both wires no matter what. I cannot find a good wiring diagram to determine if they are supposed to have power to both wires while turned off, or if one is the ground switch. I replaced the high beam switch and the headlight switch with no results. And back to my other problem, which started at the same time as the other one, my passenger side low beam is dim. When I pull the fuse for the passenger side headlight, nothing happens, the light stays on and dim. When I pull the fuse for the driver side headlight, both lights go out. I pulled the fuses of both and used a test light, there is good power to both sides. My guess is that where ever the ground switch is, the connection is bad. I cannot find anything to tell me where the light grounds at and where the switch is that controls the ground. If replacing both the high beam switch and the headlight switch did not fix the problem, I am stumped. I pulled the bottom off the fuse box and nothing is bad, loose or corroded. I pulled both connectors apart under the dash and nothing is bad, loose or corroded as far as I can see. BUT when i moved the connector initially under the dash, I heard a sparking sound. I cannot find any bad wires though. Please help I am completely stumped. A good wiring diagram would be a great help but I cannot find one. Also if anyone can tell me where the headlights ground at I would also have a better idea about where to look. Thanks for taking the time to read this very long and confusing post. Any help is appreciated.

 

Go here. Grab the 01 service manual. That will have wiring diagrams for your truck.

 

Well I figured out my problem. Sorry to wastes anyones time in reading this. But maybe my solution can help someone. After buying both switches, scratching my head for hours, and tearing the dash appart basicly, I finally decided to check the wires that run between the left and right headlight along the rad support. And there it was. Someone at one point had taken off some of the plastic insulator wrapped around the harness and must have pushed a test light into two of the wires because two of the wires had about a half an inch tear in them dumping out corrosion. There was nothing left of the wires. So I cut off the corrosion and fixed the purple wire. My low beam light was no longer dim. I fixed the green wire that went to the high beam and my high beams worked again. Simplest fix ever and I spent hours searching for the switch or fuse box to be the problem. But I feel much better now. So if anyone ever has a similar problem, look for the wires running between the headlights to be the culprit, even when it wouldnt make sense. Hope this helped!

 

At least ya got it fixed.