I've got a 02 Dodge Ram and my towing harness was all corroded so I got a replacement. The problem is that the wiring on my truck doesn't match with the standard white/brown/yellow/green of the harness, and I can't get the connection to work right (Some variations has the tail and brakes work, but only the rt blinker, some only left blinker, some the tail doesn't work but everything else does) and then all of a sudden now none of the variations does anything. It's driving me crazy so if anyone has any suggestions I'd really appreciate it.

 

Go to this site http://www.hemitruckclub.com/ and download the 03 manual. Yes, you have an 02 but the 03 should be the same. It will have all the wiring you could ever need for anything in the truck. Also, wouldn't be bad to get a volt reader and check each wire individually. One last thing, check your fuses.