Mechanics

HEATER FAN FUSE

1999 Buick Century

Heater problem
1999 Buick Century 6 cyl Automatic 130000 miles

heater/cooling fan in cab works fine on a bench test, no noise of vibrations but instantly blows the 30 amp fuse in the passenger side when installed. Have read that may be indication of something wrong with AC
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Steve terrall
August 19, 2009.




Are you talking about the high blower fuse? When testing, you can use a testlite across the fuse terminals, instead of blowing all your fuses. If the lite comes on, the circuit is going to ground. Unplug blower motor and test, if it still comes on, unplug connector at resistor assembly test again. It might be a short on the circuit from fuse to resistor assembly?

JDL
Aug 19, 2009.


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