No brakes on trailer

Gdetrailer wrote:

crazyro wrote:

Gdetrailer wrote:
If you follow the 7 pin cable back to the trailer, it will eventually terminate in a box near the trailer box on the tongue.

All grounds are supposed to terminate at that point and one ground wire from that box will run to the frame of the trailer.

I opened up that box last night looking for any stray wires or anything that didn't look right. There are no wires going out from that box to the frame. I wonder if that could be something I should add?

No need to add or modify as long as there IS a ground connection from trailer to vehicle via the 7 pin cable..

You can view a wiring diagram of the 7 pin connection HERE

Your trailer to tow vehicle cable should have a ground wire which should be WHITE.

The trailer brakes ground AND trailer lighting wires and one wire to the frame wire MUST connect to that white wire. The frame ground wire may have been done elsewhere like at the converter or battery.

The trailer brake positive wire MUST connect to the BLUE colored wire of the trailer to tow vehicle cable.

I honestly highly doubt it is "ground issue", if you were having a "grounding issue" you WILL be having issues with your stop/turn lights working incorrectly (like one brake light going out when stopping or opposite light quits using turn signals)..

I think the "grounding issue" brought up is a "red herring" sending you off down a "bunny trail" wasting your time.

The brake grounding must be done via the wiring running from the brakes all the way to the front of the trailer and back to the truck, this IS important.

Do not "add" ground wires to the frame at the axles, the ground wire IS already installed and runs up to the tongue.

See first diagram from Dexter axle..

HERE

HERE is a good writeup from Dexter on electric brakes, how they work and basic troubleshooting procedures..

I agree its not a grounding issue, but it was worth pursuing, once I realized his lights work then its not the grounding, but we all kind of tried trouble shooting to try ,and help the OP , no need for criticism .

I am no expert ,but its simple wiring, and I have wired brakes, lights etc on trailers that I have fabricated ,and its not rocket science.