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heater blower functions??? help

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Old Feb 4, 2010 | 09:40 PM
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Default heater blower functions??? help

Does anyone know if in my 78 should my heater blower fan function when my key is in the ignition position or does the car have to be started?
Reason I ask is my fan used to only work when switched to high, no medium or low. Now I replaced the resistor and wanted to test the 3 fan functions, low, med, & high but I get nothing. I dont ever recall trying the blower without the car running. Im just trying to get the 3 speeds working on the fan.
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Old Feb 4, 2010 | 10:06 PM
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I have a 81 and my blower fan comes on with the key switch in the ignition position engine not running....Tim
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Old Feb 4, 2010 | 10:14 PM
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Originally Posted by Tim81
I have a 81 and my blower fan comes on with the key switch in the ignition position engine not running....Tim
that's what I thought, but I guess I never actually tried it without the car running. I only had high function, no low or med in the past & thought maybe the resistor was bad, put in a new resistor, turned the key to ignition position & now I get nothing.
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Old Feb 4, 2010 | 10:55 PM
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With just the ignition turned on, you should only get slow speed. Try to move the heater/ac switch to heat and see if you get high speed. Also chk you blower fuse on the fuse box.......Tim
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Old Feb 4, 2010 | 11:01 PM
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Originally Posted by Tim81
With just the ignition turned on, you should only get slow speed. Try to move the heater/ac switch to heat and see if you get high speed. Also chk you blower fuse on the fuse box.......Tim
Ill check the fuse tomorrow but I did have the battery out when replacing the resistor.
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