Originally Posted by Johnnyd111
Strange but upon inspection my brake lights don't work, so I open them up. My passenger side rear has 1 bulb. But my drivers side has 2. Any ideas? My assumption would be that they would have 2 bulbs?
The first thing I would do is check the truck/car. With a straight test light check the 3 and 9 pins on the picture below.
If they are working then it is the trailer and if not it is the truck. Fuses are under the hood.
The extra bulb is the license plate/tag light.