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Old May 28, 2014 | 02:33 PM
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no power to fan motor fuses all good
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Old May 28, 2014 | 02:48 PM
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Originally Posted by B. Figueroa
no power to fan motor fuses all good
What about wipers?
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Old May 28, 2014 | 03:42 PM
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Those blower motors for a c3 are $15 to replace and super easy to get to... If that turns out to be your problem ... And not the switch.. Good luck
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Old May 28, 2014 | 06:07 PM
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Originally Posted by FireballXL5
Those blower motors for a c3 are $15 to replace and super easy to get to... If that turns out to be your problem ... And not the switch.. Good luck
the fan motor appears to be good, the switch is new but theres no power to the fan motor wires. I replaced a defective heater core and had power to the fan motor before but now theres no power ... not sure what to check next
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Old May 28, 2014 | 07:28 PM
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Start investigating what wires are hot in, and out of the switch with a multimeter or test light... ;-)
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Old May 28, 2014 | 07:40 PM
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Originally Posted by B. Figueroa
the fan motor appears to be good, the switch is new but theres no power to the fan motor wires. I replaced a defective heater core and had power to the fan motor before but now theres no power ... not sure what to check next
What year is your Corvette???

Does your car have Air Conditioning????

ONLY ONE wire has power to it...the other wire is ground.

You wrote that it HAD power to it before you did the heater core...BUT did it work???

DO you have a wiring diagram for your car????

DUB
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Old May 28, 2014 | 10:37 PM
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I have dozens of schematics on my site.. but without a year I can't help you.
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Old May 29, 2014 | 06:00 PM
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Originally Posted by FireballXL5
Start investigating what wires are hot in, and out of the switch with a multimeter or test light... ;-)
thank you again I found the power problem to be a faulty relay on the firewall
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Old May 29, 2014 | 06:06 PM
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Originally Posted by Willcox Corvette
I have dozens of schematics on my site.. but without a year I can't help you.
I have a 77 vette w major wiring problems. I found a defective relay on the firewall that stopped the fan motor from getting power
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Old May 29, 2014 | 11:00 PM
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Originally Posted by B. Figueroa
I have a 77 vette w major wiring problems. I found a defective relay on the firewall that stopped the fan motor from getting power
They get roasted from the heat off the manifold.... usually melts the connector too..

Here is the schematic... 1977-1982 Heater control a/c schematic

Last edited by Willcox Corvette; May 30, 2014 at 01:18 PM.
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Old May 30, 2014 | 01:14 PM
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I think this diagram is going to help a lot thank you again!
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