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which fuse controls the heater in a 1979 chevrolet truck?
This is a discussion on which fuse controls the heater in a 1979 chevrolet truck? within the Cars and Bikes forums, part of the Main Category category; The descriptions on my fuse block are worn off - currently searching net for diagram or something of the sort....
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06-12-2008, 12:35 AM
| #1 |
| Junior Member Join Date: Jun 2008
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| The descriptions on my fuse block are worn off - currently searching net for diagram or something of the sort. |
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06-12-2008, 12:37 AM
| #2 |
| Junior Member Join Date: Jun 2008
Posts: 5
|  Here's a fuse diagram for '77-'80 Chevy/GMC http://www.chuckschevytruckpages.com/77fusebox.html Another possibility for no heat when the fan is blowing cool air that hasn't been mentioned is the vacuum operated valve that switches coolant flow to the heater core is not working either because of a vacuum leak, defective control, or defective valve. |
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06-12-2008, 12:39 AM
| #3 |
| Junior Member Join Date: Jun 2008
Posts: 7
| Test all your fuses, if they are good it doesn't matter which fuse protects the circuit, you will have problems elsewhere. If it is your fan motor which will not run, connect a test light into the wire going to the motor, if it lights the motor is bad, or not grounded. If the motor runs but only on one speed, you have a burned resistor assembly. |
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