Troubleshooting 4-Way Trailer Wiring Not Fully Functional

Updated 05/30/2024 | Published 05/22/2024

Question:

I put a Hopkins HM11141164 kn my 2016 Chevy Colorado. When I put a tester on 4 flat plug I have power. Whe I connect the trailer 4 flat plug to the HM11141164 plug I have running lights and I will have a turn signal. When I try the other turn signal and it will not work and the turn signal that did work, wont now. I put the tester back on the HM11141164 plug and I get not readings. I will pull the tester off and then put it back on and I have readings on the HM11141164 plug. Any ideas. Thanks

asked by: Kevin S

Expert Reply:

Hey Kevin, what it sounds like is happening is that the trailer's wiring has a weak ground which is preventing it from being able to draw enough power for the lights on it to function. This is pretty commonly caused by a dirty pin on the connectors so try cleaning them off with sandpaper. Otherwise you'll need to go over the trailer's wiring and fix any short issues as you find them.

expert reply by: Jameson C

Kevin

5/27/2024

I have the HM11141164 installed on my truck. I bought a 48138 4 flat easy pull vehicle connector. I have tried hooking the lights directly to wires on the 48138. I get the running lights and I will get one turn signal to work amd when I switch to the other turn signal and it won't work and when try the signal light that did work, it won't work now. Any ideas on this? Thank you.

Jameson C.

5/27/2024

@Kevin It sounds like maybe you have the running light and turn signal/stop wire mixed up and that's causing the lights to not function properly. White is typically ground, brown is running lights, green is right turn/stop, and yellow is left turn/stop.

Kevin

5/29/2024

@JamesonC I have the wires connected correctly. I wonder if something is not working correctly on the converter box.