Pontiac Problems? Ask a Mechanic for Answers ASAP
Anytime the battery is hooked up backwards it tends to blow fuses in the fuse box. The first one to check is the 100 AMP alternator fuse. It is usually the first to go.
The best way to check fuses is with a multi-meter. You set the meter to ohms/resistance and then check across the terminals of the fuse. OL means the fuse is bad. If you don't have a multi-meter you can pull the fuses and visually inspect them. You should see a break in the fuse filament.