Pontiac Problems? Ask a Mechanic for Answers ASAP
Hi There, I'm Clayso a certified master automobile technician with 30 years of automotive repair and diagnostic experience.
From your description sounds like the Brake Transmission Shift Interlock (BTSI) fuse has no power. If there is no power at the BTSI fuse most likely the ignition switch is at fault. At the neutral switch there should be power orange or yellow wire at pin B. Pin F lt/green wire should have power when in reverse. The link below are for the neutral switch and the reverse lights.
Park Neutral Safety Switch Circuit
Reverse Lamps Circuit
Let me know if there is power at the BTSI fuse.
I hope this information is helpful. If you have any questions let me know. You can reply back to me through this thread at any time.
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Thanks so much.