Trailer Harness Lights dont work when I hook up my trailer to my Ram,
but they work great when I hook it up to my Bother Chevy Silverado..

Is there a Interanal Fuze I can check some where??

Please Help..

Thanx,
Rob

 

yes i think there is a fuse in the fuse panel but id have to check. If nothing else you can temporarily wire up a 4-flat or whatever connector you need by tapping into the taillight wiring. My truck has the plug in the bumper and it also has a secondary plug under the truck just in case. Never had to use it though.

 

my running lights wont work through the trailer harness...I dunno man, no fuses for me

 

I have a 4 Way Flat under the Truck, but I Need my Trailer Breaks..
I have a 1000Lb Trailer + My Rustang (or Other things In Tow) on it..

If you find it, can you give me the Fuse #?? I have The Same Tires on
my Truck Same-ish Wheels Too, M/T Classic IIs.. I have 0" Lift on it tho..

Thanx,
Rob

http://s261.photobucket.com/albums/i...s.jpg&newest=1

 

Without going out to grab the owners manual, I believe it's fuse #46...

 

yea my manual doesnt have the fuses listed

 

I had the same problem when I had my Cheby Avalanche, I actually traced all the wires on my bass boat trailer and everything looked fine. Then I hooked up to the former Mrs. Hammer's Grand Cherokee and had lights, turn signals, etc.
The owners manual didn't list a thing for trailer lights, so for the hell of it, I just started pulling fuses. Came across one that was blown, a low capacity one, was either 10 or 15A. Replaced it and everything worked fine...

 

Well the 06-08 has like maybe 20 fuses, total. I checked each one, all work. I used a tester on my plug and it shows everything working but running lights, but the running lights work on my truck (so obviously its something with the wiring system) I guess I need to poke my meter into the wire before the plug to make sure its not just a bad plug

 

I replaced all Fuses that Said "Trailer", none of them were Blown..
................................At The Plug.........................................
But I now have Running Lights, Jus no Break Lights/Turn Signals..

Im gonna Pull wires off of the plug, When its not like 95*..

Thanx,
Rob

 

I had a similar problem with a boat railer and found that I had a bad groung wire on the truck. Assuming you have power at your truck plug, you can check the ground by connecting a piece of wire from a clean part of your frame to a clean part of the frame of the trailer. Keep the trailer plugged in at the same time. If lights come on when touching the wire to the frame, new ground wire to truck frame would be the answer. Sometimes when you have a bad ground on the truck, the trailer gets grounded through the hitch but that is if there is no grease on the ball, no rust on hitch pin, etc.