Interior Fuse Box Location: 2004-2008 Pontiac Grand Prix Click to view0:09The video above shows how to replace blown fuses in the interior fuse box of your 2004 Pontiac Grand Prix in addition to the fuse panel diagram location. Electrical components such as your map light, radio, heated seats, high beams, power windows all have fuses and if they suddenly stop working, chances are you have a fuse Author: Honda City Pontiac Grand Prix - 2004 Fuse Box Diagram Pontiac Grand Prix - 2004 Fuse Box Diagram. Home; Pontiac; Circuit breakers in the fuse panel protect the power. windows and other power accessories. When the current. load is too heavy, the circuit breaker opens and closes, protecting the circuit until the problem is fixed.