I had to change dimmer switch and light switch,since than i have no tail lights,Ihave all others[brakereverse] any ideas?

 

Did you have trouble getting the headlight switch out? is the plug seated properly. I have heard that if you pull on the wires trying to get it unplugged you can break a wire. check your fuses too. Did you have to change both the dimmer and headlight switch because of a short? maybe poss wiring harness damage