Originally Posted by pizzaguy
Now, are your lights used or new? If used, the sockets could be so corroded that WIRING is not the problem, the sockets are! If THIS is the case, you can screw around all day and not get anywhere!
YOu can temporarily turn on the parking lights, have the side markers come on, and then use that hot lead to experiment with different combinations of the wires coming out of the light assemblies and therefore identify what is what. Take the lenses off so you can see WHAT element in the light comes on.
Remember, the smaller element is the tail light, the brighter one is the stop/turn.
The lights are original for the trailer.
The tail lights look just like this:
There is one black wire coming from the side tail light bulb and a black and a red wire coming from the main tail light bulb.
Thx.