my 92 chevys tailights arnt working and its not the bullbs or the fuse and i dont kno what it is, and i have ruled out it being a short so i need some help what is it????

 

Since the bulbs and fuses are OK you are down to the switch or the wiring harness. I think I'd try jumping the switch first.

Jaybee

 

Just checking, is it the tail lights or the brake lights? I know you said tail lights but sometimes people mean brake lights.

 

Check the ground on the frame in the back of the truck. Make sure it's got a good connection.

Next question, are both sides not working or just one? If it's just one I would take a look at the computer board inside the light housing itself. Very common for these to go out.

Like someone else said, could very well be the switch too.

Buck