7 Pin Connector From Truck to Trailer
I have had an issue that happened now on two separate Silverado 2500's. When I would plug the trailer plug into the 7 pin receiver on the truck I would get an error message saying "Check Trailer Wiri...
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on a whim I did a quick internet search about this. The issue seems to be mostly related to either a poor ground connection or poor brake wire connection.
If it was my truck I would look at the trailer plug and see if it's possible to remove some screws and open it up. If so then pull the screws and slide the outer shell off the trailer plug exposing the wiring connections. Inspect and tighten each wiring connection making sure that the bare wire is fully trapped under the end of the screw. Then put the plug back together.
If all is tight then try cleaning the ground connection on the trailer to the plug on the trailer. Or clip a standard jumper cable (for jump starting vehicles) from a ground on the trailer to a ground on the truck. Bungee or tape the jumper cable up out of harms way and go for a drive.
If it still fails you'll want to inspect the brake wiring from the trailer plug all the way back to each individual wheel. Look for exposed wiring or places where the wire might be pulled tight across a corner and rubbed through.
If all this fails to resolve the issue then I would by a $10 spool of wire at Home Depot and cut every brake wire behind the wheel. Then run a temporary wire from the plug to one wheel at a time and go for a careful drive. Keep swapping and testing until you can isolate which wheel is tripping the message.
Here Chevy has a bulletin about it that basically says check the trailer wiring.
Link
If it was my truck I would look at the trailer plug and see if it's possible to remove some screws and open it up. If so then pull the screws and slide the outer shell off the trailer plug exposing the wiring connections. Inspect and tighten each wiring connection making sure that the bare wire is fully trapped under the end of the screw. Then put the plug back together.
If all is tight then try cleaning the ground connection on the trailer to the plug on the trailer. Or clip a standard jumper cable (for jump starting vehicles) from a ground on the trailer to a ground on the truck. Bungee or tape the jumper cable up out of harms way and go for a drive.
If it still fails you'll want to inspect the brake wiring from the trailer plug all the way back to each individual wheel. Look for exposed wiring or places where the wire might be pulled tight across a corner and rubbed through.
If all this fails to resolve the issue then I would by a $10 spool of wire at Home Depot and cut every brake wire behind the wheel. Then run a temporary wire from the plug to one wheel at a time and go for a careful drive. Keep swapping and testing until you can isolate which wheel is tripping the message.
Here Chevy has a bulletin about it that basically says check the trailer wiring.
Link
