does anyone know where the power accessory relay is located in a 96 z28 camaro.. no light work on the back of the car tail light brake lights reverse lights or turn signals.. don't know what else to do.. please help

 

There is no "accessory relay" and there is no relay period powering the lights at the rear of the car.

Most of them are powered by the same fuse #5. A 20amp located in the I/P fuse panel.

For turn and B-U that is fuse #2 a 15 amp and for Stop/hazard that is fuse #1 a 20amp both located in the I/P panel as well.

If more than one of those is blown, it probably tells you it has a catastrophic wiring issue. If the car ever had body work, start looking in that area.