Pull the air bag module , don't recommend you do that ! Is the air bag light lit on the instrument cluster ? Horn not working an air bag light lit would indicate clock spring problem . Do you know what the clock spring is ?
How cars clock spring works
Did you check the horn relay ? Do you know what a relay is ?
VEHICLE RELAYS Operation Diagnosis
SOURCE: Horn relay on a 2004 pontiac sunfire
It's usually in the engine compartment in the underhood fuseblock.
SOURCE: 1996 PONTIAC SUNFIRE HORN JUST
Check the fuse for the horn.
Check the wires have not just come loose on the horn.
Next, if you have a volt meter, disconnect the horn, and connect the wire for the horn to the meter.
Have someone press the horn button.
If you have a reading of 12 volts or better, the horn is dead, if you have a reading of less than 12 volts, the the horn relay is likely faulty.
That is the item that is clicking as you reported. Just because it is clicking does not mean it is passing power through.
Hope this helps
Ed
SOURCE: Were is the thermostat located in a Pontiac Sunfire 2000?
Hi:
Your thermostat is located under the thermostat housing, which is what the upper radiator hose clamps to on the top of your engine. Basically, you need to start with a cold engine, drain your radiator, then unclamp the upper radiator hose from the engine. Remove the bolts from the thermostat housing, and gently tap on it to remove it. clean up the mounting surfaces on both the engine and the housing, and install a new thermostat, and new gasket. tighten to proper torque, reconnect the radiator hose, then refill up the radiator and cooling system.
Testimonial: "Thank you, very helpful"
SOURCE: Rear seat in 2000 Pontiac Sunfire. Can't
Hi,
There is two black plastic clips need to be replace on the seat
on the little rod and then push strait
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