1. Rear Defroster: This switch activates the rear window defroster grid to melt away ice and frost.
2. Headlight High Beam/Parking Light switch: This is often a single rocker switch, with one position for parking lights, a center detent for low beams, and the other position for high beams. Some models might have separate switches.
It's important to note that some options and configurations varied depending on the specific trim level and options selected for the vehicle. If your switches look different than this description or function differently, it might be helpful to consult your owner's manual (if you have one) or look up a wiring diagram specifically for a 1980 Trans Am Firebird with your options.