We found a few issues towing with a 2000 model 1 ton GM truck. Not sure if the same as 1994, but the headlight switch was crap and not up to the task of the clearance lights, running lights, brake lights, turn signals all running through the cheap headlight switch and the tiny gage wires. I would recommend changing all the trailer lights to LED's if not already. That will take allot of load off. If you don't want to do that, then use a relay, (s) to limit the current going through the headlight switch. This issue left us without any exterior lights in the middle of the night in Washington, DC on the way to a race. Automatic gunfire in the distance, middle of the DC, Ghetto, high rolling enclosed race trailer full of tools and a race car. Not a great situation. Headlight switch was a glob of stinky melted plastic.
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