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?
Yes, it was called astro ventilation at that time
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?
You could put a simple on/off switch for the power to the motor.
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.
Needs constant power. a simple switch for the blower would be the easiest solution.
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