Ive had this issue now with two new trucks. Each component should have its own ground to the frame of the trailer.
Wiring Harness Conversion U S To European Cr4 Discussion
How to check wiring on a trailer. The first a 2014 silverado 1500 and now my 2016 sierra denali. You can use a circuit tester to verify connections. Have a helper stand back to see if the running lights stoplights and blinkers are working properly. Check out or trailer wiring diagrams for a quick reference on trailer wiring. The key to detecting a wiring issue is to eliminate possibilities until you can determine the source of the problem. It has the factory trailer brake controller and i have been getting service trailer brake system and check trailer wiring it has been to the dealer twice for this and the first time the service trailer brake system light would not go out even if it didnt have a trailer hooked to it.
Begin by cleaning the ground connections. First you may want to check the lights on your trailer the problem may be as simple as a burned out bulb. If all the lights appear dim or you have no lights at all check the trailer light harness at the tow vehicle. The below information is for reference and is commonly used throughout the industry but can vary depending on who built the trailer. Id love to blame the problem on trailer wiring but the same trailers fu. Be sure to check out our trailer wiring diagrams for wiring identification and how to wire a trailer for additional information.
If thats not the problem youll need to disconnect your trailers wiring system from your tow vehicle. Any trailer i ever connected them to i constantly get the trailer connected message followed by check trailer wiring. This is a must before installing a wiring harness onto anything. Check your vehicles plug configuration. Do not take it for grated that a new harness is good. 2015 2500hd check trailer wiring and service trailer brake system i have a 2015 2500hd 60.
Hook up your trailer and connect the trailer light harness. Two types of a trailer wiring tester. Ground problems are the top cause of issues with trailer wiring.
Gallery of How To Check Wiring On A Trailer
