Mechanics

GMC OTHER BLOWER MOTOR PROBLEM

1979 GMC Other • 80,000 miles

Should your heat/a/c blower motor run all the time on low with it not turned on to cool or heat?
Avatar
Richfile
January 24, 2013.




Yes, it was called astro ventilation at that time

roy

ASEMaster6371
Jan 24, 2013.
Is there a way of running the power for it it through a relay to where it will only come on when your'e calling for heat, cool, or vent? Or maybe modifying the relay that controls it now?

Tiny
Richfile
Jan 24, 2013.
You could put a simple on/off switch for the power to the motor.

Roy
AD

ASEMaster6371
Jan 24, 2013.
Well yea, but I don't want to be drilling holes in my dash or somewhere to add a switch that doesn't look like O.E. I guess what I was looking for is can the power that feeds the relay now be moved to a power sourse that would only run when the unit is calling for heat/cool/ or vent, or does that relay have to have constant power for other reasons? Or, can I add a relay to break the purple wire feeding the motor, but I'm not sure how to control the coil fo the new relay.

Tiny
Richfile
Jan 24, 2013.
Needs constant power. A simple switch for the blower would be the easiest solution.

Roy

ASEMaster6371
Jan 24, 2013.

AD