2021 1500 Silverado break controller has no gain.

[jmk]

I bought a used trailer and put all new lights wires and breaks on it. I hooked up the breaks last weekend and they were all humming nice and loud. I took it for a test ride and turned the gain all the way up because I wasn't feeling much braking. Right rear wheel locked up on gravel but the others kept spinning. I thought maybe grease got through the seals and buttered up the brakes on the others but this weekend I took apart the front left and it all looked good. I put it all back together and now I don't get any hum on anything except for when the override is squeezed. Looking at the dash it says trailer brakes connected. I can change the gain but the indicators don't light up when I step on the brake. I checked the fuse and it's good. I jammed a snow brush between the seat and peddle and tested the junction box and I only have a reading of 0.5 on average it fluctuates. It never hits one volt. Anyone have any ideas?  

[Anacortes Army Guy]

First thing I'd try is hooking your truck up to another trailer known to have a properly functioning brake system and see if you can determine if it's a tow vehicle issue of a trailer issue.

[jmk]

I will have to find one, but that's a good Idea. 

 

[Phantom 4D]

Loose connection? I agree with Army Guy.

Edited August 21, 2021 by Phantom 4D

[jmk]

Okay, I found a friend with a trailer and the truck is fine. It's probably the scotch locks I used. I will redo the wire connections.   

[SVG]

I'd be soldering all wiring connections and covering them with heat shrink tubing if it was me.