2003 Dodge 3500- Had some blinker issues, truck has been coated in road salt lately, and got some green copper oxidation in trailer wiring connectors.
Hazards and sometime the left blinker were flashing 3rd brake light and brake filaments in tail lights. Cleaned out trailer plugs and replaced all rear taillight bulbs. Now...

Passenger taillight doesnt work, front blinks fast, passenger taillight doesnt show any power at trailer wiring or wirirng that plugs into taillamp plastic housing plugs with testlight. Tried plugging the left lamp assembly into the right side, still no light. Fuses are good, havent chased out the wiring yet to look for breaks or chafing. Unplugged the brake controller and trailer hitch wiring plug from harness, no change. Lamp out on dash board is always illuminated now (was intermittent when blinker was lighting up brake lights.) Hazards and blinker still dont light up that side bulb. Brake lights work fine.

Any change I need to have possible faults cleared and hope I resolved the problem and the computer shut the circuit down to save it?

Any help is appreciated

 

Check for a loose or broken ground wire. Do you have any codes?

 

Havent checked for codes- Didnt even consider that the computer could be reset as other have discussed other trailer type wiring threads until this morning.

Didnt check ground, but figured where tail and brake lights in the assembly were working, its grounding fine?

 

Remove the taillamp in question, then remove the "board" that holds the three bulbs in it. Remove the bulbs and CAREFULLY inspect the metal prongs that hold the bulbs in and complete the circuit. Make sure they are all clean. Several guys on here (including myself) had similiar issues and found the prongs black. I took my wives nail file to clean it and have had no issues since. Also, have heard this will be less of an issue if you buy the all glass bulbs instead of the one with plastic bases, as they tend to melt a little over time, hence the bad conection and the black residue.

 

sounds like a classic case of low blinker fluid...

 

I just had a similar issue, my wiring harness to that lamp was crushed under my bed frame.

The first thing I would do is take the good light panel and plug it into the side that is not working. That will tell you if it is a panel problem, or a wiring problem. If that's not it, then it's time to chase some wires.

I took my spare tire off and got under the truck and followed the wiring back until a saw a visible problem. If you don't see anything, time to break out the multi meter.

Keep us posted. Like I said, I just trouble shot a blinker problem and fixed it, if you have any questions, PM me and I'll do what I can to help.

 

also, make sure you get the higher quality halogen fluid.

 

yeah clean the prongs and bend them out a little bit to hold the bulbs tighter had it happen with mine