1993 GMC Van Heat/ac blower not working

1993 GMC VAN

180,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC

VINTSHAVE

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Hi,

Just got this G3500 van, school bus edition at auction. It's pretty good except for the following problem. When I try to turn on the heat or the a/c, I get nothing from the blower. Not the one in the dash or the one in the back of the bus., which is a separate unit. I'm less concerned about that one, but it would be nice to have it working.

I checked the fuses and they are not blown. What would I do next and how would I do it?

Thanks!

John

Oct 31, 2014 at 12:08 PM

CADIEMAN

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USE A TEST LIGHT TO SEE IF YOUR GETTING POWER TO THE MOTOR. IF YES TRY GROUNDING THE MOTORS HOUSING. IF IT TURNS ON REPLACE THE POWER MODULE.
U ALSO CAN REMOVE THE MOTOR AND HOOK IT UP TO THE BATTERY.

Oct 31, 2014 at 1:23 PM

VINTSHAVE

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Where would I find the blower motor in the van? I have no idea where it is.

Oct 31, 2014 at 1:26 PM

CADIEMAN

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IT'S UNDER THE R/SIDE OF THE DASH.I THINK IF U REMOVE THE GLOVE LINER AND THE R/SIDE OF THE LOWER DASH PANEL U WILL SEE IT.MAYBE IT'S THE UNDER HOOD AT THE FIREWALL.

Oct 31, 2014 at 4:04 PM

CADIEMAN

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TRY TAPPING IT WITH A HAMMER IF U GETTING 12V TO THE 2 WIRE CONNECTOR. THE STRIP WIRE IS 12V THE BLACK IS GROUND. HOOK THE TEST LIGHT CLAMP TO THE POSITIVE BATTERY AND PROBE THE BLACK WIRE THE SHOULD LIGHT ..

Oct 31, 2014 at 4:24 PM

VINTSHAVE

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Smacked it with a wrench. It went on but it only blows hard on ac. You can hear it but not really feel it on heat.

Oct 31, 2014 at 9:02 PM

CADIEMAN

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replace the motor

Oct 31, 2014 at 11:13 PM

VINTSHAVE

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Probably not a bad idea, but why would it blow hard only on A/C?

Oct 31, 2014 at 11:15 PM

CADIEMAN

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ARE U OK

Nov 23, 2014 at 5:01 AM