Mechanics

CHEVROLET ASTRO FUSE PROBLEM

2003 Chevrolet Astro • 145,000 miles

My blower motor does not come on. I checked for power and do not have checked fuse it is good dont know what to check
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Guest
February 13, 2013.



Check the FRT HVAC fuse (30amp) in the underhood fuse box and if that is good, then you likely have a bad blower resister.


Wrenchtech
Feb 13, 2013.
At the front blower, purple wire is voltage. Black is ground. At the top right of diagram that front hvac fuse, is hot all the time. Use a voltage tester, check for voltage at the fuse circuit. That voltage on that circuit is only for high-speed, only. When that relay in the resistor assembly is energized, that line with the arrow head moves to the other terminal, carries voltage to front blower motor. When relay is not energized, you have continuity for lower speeds. Could be problem with resistor assembly?


JDL
Feb 13, 2013.
Hi wrench, didn't see you, maybe you guys can use diagram.


JDL
Feb 13, 2013.
This is going to have a bad resister.


Wrenchtech
Feb 13, 2013.