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Problem with 1997 Pontiac Grand Prix

I’v had all kinds of problems with this car, many outside to nature of this inquiry. My main problem as of late is today my car wouldn’t blow any air out of the vents. Hot or cold, none at all. On the knob settings none of the setting one through five (high to low) would affect the air. Nothing would work. So I took a peak in the fuse boxes and replaced the Hi (5) fuse and so now I can get high heat or high air, but I cant seem to find the fuses for the other settings. I would like to replace those too, cause it is probably whats wrong, and I’m trying to avoid a costly repair. Anybody have any suggestions? I’v already looked in the owners manual without luck on how to find these fuses.

So you got the fan running only on the high speed. Good! Now the next tings to check are the high speed blower relay, or the blower motor resistor pack.

The high speed blower relay is what switches the voltage between the resistor pack or directly to the blower motor. The blower motor resistor pack is what controls the lower blower speeds after the high speed blower relay switches over to the resistor pack. If either of these are faulty, you’ll get no lower blower speeds only high speed.

Tester

Thanks, that was very informative.
Is there any way though you could give me a tutorial on how to check the resitor pack or the relay switches.
If you could that would help me out even more.
Thanks again, Brad

Tester,

Yes please a tutorial on how to check the resistor pack and/or relay switches. I’m having the exact same issue.

Thanks, John