Trailer lights

[floatman]

I just bought my new but used 2005 silverado and hooked the boat up to it this morning and found that everything except the tail lights and side lights work. Does anyone have any idea or quick fixes before I start tracing wires?

I have a 05 silverado, my trailer were giving me trouble, we tried everything, found it was the round plug that goes into the bumper, it came with the truck, it's a GM and a piece of junk, if you plug it in and roll it around you bend the contacts back, after checking I looked inside the end that goes in the truck and each post had a flat peace of metal, I took a small straight screw driver and bent them towed the middle of the plague, that was it, try it and after bending those posts your lights work get you another plug......JMO

Gary