Trailer Wiring Help

[jthielm]

I have searched through the previous topics on trailer wiring but am still at a loss. I installed a t connector wiring harness on an Isuzu Rodeo and the only lights i can get to work on my trailer are the front flashers and these only work when the taillights are off. When i put a circuit tester on the vehicle connection none of the sockets light up. I have made sure that my ground wire is on a clean spot on the vehicle(screwed into the frame also cleaned with solvent and sanded). I checked all the t connectors to make sure they were properly connected. The vehicle tail lights and blinkers still work(wouldn't this eliminate a blown fuse?) Is it possible that my ground is not good enough? Any help is appreciated.

 

[redbug]

It very well could be the ground.
You could also check each socket to be sure the contacts are clean
if you have a tester check the plug at the back of your truck and see if you have power there and work your way back

good luck
Wayne

 

[ben2go]

I agree with the above statement.More than likely a fuse on the vehicle side or a bad ground.

 

[Specknreds]

Someone can probably help you better than me but, do what Redbug said. I bought a t plug for a jeep and it did the same thing. I took it back and it turned out to be a bad t plug.

 

[Macgyver]

sounds like the integral wiring converter in the "T" connector is bad.

 

[Loggerhead Mike]

exactly what style harness are you wiring up 4 or 12pin? i may have a wiring diagram hiddin around here somewhere, what year / motor ( count 8 #'s back from end of vin) is your rig?

 

[Hanr3]

You sure that truck has a grounded frame?

Run a ground wire back to the battery to eliminate the ground as the problem. If you still have the same problem with a ground wire on the battery then suspect your wiring harness or the harness connections. I doubt its your fuse if your blinkers (not hazards), running lights, and brake lights all work like normal on the truck. Hazard lights are run through a different fuse than the blinker lights, its a safety thing. Also a different fuse for the stop lights. again its a safety thing. Check your owners manual for trailer wiring information.

 

[jthielm]

Finally got it. It was the ground. The frame wasn't grounded. Thanks for the help.

 

[Hanr3]

I thought so. :mrgreen:

Your welcome. Glad you got it figured out.