Problem when connecting trailer

That is certainly where I would start looking; both the feed and the earth.

I cleaned both the connections but nothing does anyone have a diagram for the plug wiring

Left-hand rear what? Side/tail/reverse/indicator/etc?

What happens when you plug the trailer in and switch on the circuit listed as faulty? Do the corresponding trailer/car lights operate?

More info, more info please :?

Scotty

i get the same issue ONLY when I connect a trailer with the lights. I get "RH BRAKE BULB FAILURE" and as soon as I disconnect the trailer, all is fine and the message never shows, i thought maybe it was telling me the trailer brake light is bad

Does the light work when the failed message is up?

Plug your trailer into a known good socket and see what happens.

Try a known good trailer/board on your car and see what happens.

By then you should know exactly where the problem is.

This happens because both the brake lights(trailer) are on the same circuit, when you brake the car thinks a bulb has blown as there is an imbalance left to right.

Do you have straight wiring into the factory harness or do you have the LR trailer module? Does the trailer warning light on the dash operate?

Without the module your truck thinks the bulb on whatever side you are directly wired to is blown because has a voltage difference.

I get LH BRAKE BULB FAILURE but all the bulbs work the trailor indicator on the dash works fine. I think john-sussex is right probably just wired up different to the trailer I used the other day.

john-sussex said:

This happens because both the brake lights(trailer) are on the same circuit, when you brake the car thinks a bulb has blown as there is an imbalance left to right.

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so its normal?

Not too sure as you are across the pond from me, but in the uk it is common for the light to be independent but both brake lights are one. I used to have a Volvo and to get round it the wiring was attached to the fuse box.

You just need a converter box is all.
The trailer has brake/turn signals together, the RR has them separate.
I solved mine with a converter box that also protects the RR ecm's should a short occur.

Martin

i have the box