2.2l manual trans sonoma bu-lights

My back up lights aren't working. Fuse good bulbs good. Someone said it was some wiring on the tranny housing? wtf? What is teh part actually called? Has anyone heard of this?

did u put led bulbs in any of ur fixtures?

that part that cause that is called the revseue light switch it has 2 or 3 wires on it all you need to do is unscew the switch and repalce it takes about 5 min. i think its on the left side of tbhe trany