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ofbsac

heater/ac fan will not shut off

Question

I have a 1962 grand prix that the heater/ac fan will not shut off until I unhook the fan wire from the switch next to the fan under the hood

This fan blows air for the ac/heater

I don't know if I need a new part that the fan wire hooks up to( I don't know what this is called) it has 8 spade lugs

Will it cause the fan to keep running?

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6 answers to this question

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Would highly suspect that the switch itself has gone bad...When you unhook the wIre from the blower motor and it shuts off....Does the blower come back on when you hook the wIre back up ????

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Edited by TWO LANE BLACK TOP

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yes as soon as I hook up the fan wire it turns on. I don't even have the key in the ignition. I pulled the resister out and cleaned it up ,but it still turns on as soon as I hook up the wire to the fan. Do you think it could be the dash controls? I am very happy for your help. Change the dash controls next?  I don't want to keep opening the hood to unhook the fan each time i stop!  thanks again for any help. ted

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I suspect the blower switch...But before you start changing switches....Make sure that there are no wires under the dash or under the hood that are chafed or rubbing together causing it to pull unwanted power from another source....Not 100% sure but think that you might be able to just get the heater fan switch by itself without having to get the whole dash unit...Would be worth checking into....

One of my friends Grand prix...

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Edited by TWO LANE BLACK TOP

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I have two different blower switches one for the ac and one for the heater. Can I test them?

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Yes you can test the switches First thing to do is unhook the wIre harness from the switch..If you can pull the unit to access the back of the switch it will make it alot easier to do...

Once you gain access to poles that the harness plugs into....Using a multimeter on the OHM setting place the black lead on the ground pole of the switch...(switch may have more than two poles... One of them is ground... Possible may be marked) Place the red lead on the other pole with the switch in the OFF position...should show OL...If it does not that means something inside the switch is broke and needs to be replaced...Can do the same thing with the continuity setting on the meter..Black lead on the ground..Red lead to the other pole with switch in the OFF position if it beebs means switch is bad...

Am sure there are other members out there that can better explain the procedure.....

 

Edited by TWO LANE BLACK TOP

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two lane thanks

I have not heard from any one else, when I return home I will try your idea

thanks

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