Mechanics

FUSE BLOWS WHEN FAN TURNED TO HI SPEED

Chevrolet Silverado

1981 Silverado, 193K + miles, 350 motor, 2wd. The fuse for the blower motor blows each time the speed is switched to Hi, it works in the other positions(speeds) with no problems. I have replaced the blower motor, the fan switch and the blower motor resistor. I have also made sire the plug for the switch is not melted. Is there anything else to check? Thanks for your help.
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FStrickland
March 11, 2007.




One quick question, does this happen in defrost, ac or any mode

Jim

Tiny
CHEVYII
Mar 11, 2007.
Any mode.
Thanks.

Tiny
FStrickland
Mar 12, 2007.
I cant find a diagram that old but I have one for 83, if they are the same there is an ac resistor and relay under the hood, have you looked at those yet

Jim

Tiny
CHEVYII
Mar 12, 2007.
Not familiar with the relay, but I have also changed the resistor and the heavy gauge orange wirethat plugs into the resistor.

Tiny
FStrickland
Mar 13, 2007.
The ac relay and resistor should be under the hood on the right side of the firewall chek those out too

jim
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Tiny
CHEVYII
Mar 13, 2007.

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