I installed a brake box on my GMC D/A and when I put the truck in drive the brakes come on? Also when you put the truck in drive the daytime running lights come on they are in the parking lights on this truck. Any suggestions?
Posted 2007-04-23 9:59 AM (#59787 - in reply to #59721) Subject: RE: Brake Box / Daytime running lights
New User
Posts: 2
Location: Northern CA
in some configurations of trailer plugs there can be two ways that the brakes are wired and if you get it wrong, the brakes go on when you power up. The connector can be rewired to swap those wires. Some adapters, (when the truck and trailer have different numbers of pins) also have the ability to swap this wire inside the adapter, leaving the truck and the trailer as they were.
Whoever installed the brake box should have verified this and handled the wiring option properly.
Brake Box / Daytime running lights
