Trailer Lights Dim On One Side. How To Fix Dim Brake Lights Many trailers use the ball as the ground connection.
First, I thought my passenger side headlight bulb blew out, but upon closer inspection it was on, but barely visible and super dim. I have seen some dimmer switch diagrams but its usually a single light "system". I thought it was bad, and to check it, I swapped it with the driver side bulb and it works fine in the driver side!
A few months ago the right side of the dash lights including the speed and mileage was noticeably dimmer than the other side.
I switched the bulbs, put the passenger in the drivers.
I just replaced both headlight bulbs, however one headlight, the passenger side, is still dim. Cant figure out why my light goes dim on just one side, but if i give it a good tap, it goes full brightness, but then it will dim again later if i hit a. Lights on dash dimming on one side?