What coler wire is what going to the trailer

if you have a right signal on the truck and no signal on the trailer then you need to check the wire were it comes from the truck wire harness to the trailer plug. possibly a bad trailer plug also

Try this site. http://www.etrailer.com/faq-wiring.aspx. They give color codes and detailed info.

We just had the same problem with our 99 2500 Turbo Diesel Ram. The problem ended up being the factory trailer cord recepticle near the hitch. When we unplugged the harness from the back side of the recepticle we found that the brake terminals had gotten hot and burned out. We replaced the recepticle (about $30 from Dodge) and our problem was solved.

I have always had success when using these diagrams to wire trailer connections.

IT SOUNDS LIKE PROBLEM IS WITH TRAILER WIRING,NOT THE TRUCK..IF NOT BLOWING FUSE UNTIL YOU PLUG IN TRAILER,CHECK TRAILER WIRING FOR SHORTS IN WIRING,CHECK FOR CORRODED LIGHT SOCKETS,BAD GROUND CONNECTIONS..LET ME KNOW WHAT YOU FIND

try http://www.etrailer.com/faq-wiring.aspx. This should help.

It should have a fuse for the marker lights. Do they work on the truck. Brown is the color for the marker lights. Good Luck

Hi Charlie

Six wire plugs:

Horse, stock or utility trailers:
White = Ground - GD
Yellow = Left turn/Brake -LT
Green = Right turn Brake -RT
Brown = Tail and clearance lights - TM
Red or Black (not both) = Battery, aux power - A
Blue = Electric Brakes - S

Ground should be 10ga.
Others 14 ga

Best regards
Mike

I have seen once before that the fuse box was bad on a 2003 Dodge 3500. I had power in and nothing out. We had to replace the box. Not cheap! Hope it is simple like a loose connection though. I think I had to pull the inner fender on the drivers side to access the bottom of the fuse box. Pain in the ****, but...