Do you have a volt meter to check if you are getting a signal to the left
light at the truck connector?

My 2001 Chevy truck came with a factory trailer harness and has seperate
fuses for the trailer connetions from the truck tail/brake lights.
I fixed my problem you describe one time by replacing the trailer wiring
fuse under the hood. I would not have found it without the owners manual.

Good luck,
Joe

wrote in message
oups.com...
I have been having on again off again lighting problems with my
trailer. I bought a brand new wiring kit with the grounding for the
rear lights supposedly being handled by the metal screws and the metal
to the frame.

We get brake and turn signal on the right side, but nothing on the
left. Interestingly enough, it is the same problem which led us to buy
the new equipment.

I have a ford expedition with the basic green/yellow/brown/ground
coming from the truck, and the wiring harness has the brown/yellow,
brown/green pairs and also a ground.

The ground is attached to a bolt on the trailer. The wiring otherwise
is clean and in perfect shape.

Any ideas on what i can check, etc?


Chuck