Last time I hauled a trailer with my jeep, the lights were extremely dim, thinking it was just a rusty ground, I thought nothing of it.

This past weekend, I hitched up to my tent trailer with new grounds, lights are still dim, so i through the dmm on the hitch plug, and it was reading around 5 volts with blinkers, brakes and running lights, if they were on, same voltage across their corresponding plugs.

Because it has a Litemate converter in the back, I backprobed the wiring a little further back, same voltage. I am guessing 5 volts isn't what it should be getting.

Any suggestions where to look without ripping all the current wiring out lol.