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05-15-2007, 07:33 PM
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#1 |
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Registered User
Join Date: Dec 2002
Location: Cactus Patch So. Az
Posts: 4,749
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78 C10 A/C question
How do I tell if the fan switch is working without taking the dash apart?
My A/C wont fire up, fuse is good and power to the red, hot side of the fan reley. I jumpered across the low pressure switch at the accumelator still wont fire . when I jumper across the reley red to the yellow everything starts and cools but the reley gets very hot! What next?
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05-15-2007, 07:41 PM
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#2 |
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Wishin' I had more money!
Join Date: Feb 2007
Location: Eugene, OR
Posts: 1,242
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Re: 78 C10 A/C question
Try completely bypassing the high blower relay and see if you can get a constant speed out of the blower motor. From under the hood you should be able to hear if the motor kicks on high or not. If it does, you have a bad relay or bad connections, which is what it sounds like to me. If it doesnt, you have a wiring issue and need a diagram.
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