Buick Repair Questions? Ask a Mechanic for Answers ASAP
Well, first lets test the system.
I will be sending a copy of the wiring diagram to assist in the diagnostics.
What I would like you to test first is that the airbag fuse is good. If this fuse is good, I need you to then remove the theft deterrent relay.
While holding the key in the crank position, do you have power on pin #30 and #86 ?
If you have power to these pins, while holding the key in the crank position, do you have battery ground on pin #85?
Please let me know what you find....