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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

blower motor relay

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Old Jun 5, 2010 | 08:51 AM
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blower motor relay

i have a 1986 f-150 xlt supercab. my blower motor was working fine then just quit. was working fine when i turned the truck off them 20 mins later started her back up and blower was not working. i checked the fuse and it looked good. i can find the relays. does anyone know where there at? or any ideas of what might be wrong? thanks
 
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Old Jun 5, 2010 | 09:19 AM
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First thing I would do is pull the wire off the motor, and run a jumper wire from the bat + over to the motor terminal and make sure the motor is good.
 
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Old Jun 5, 2010 | 10:15 AM
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Originally Posted by backdraft341
i have a 1986 f-150 xlt supercab. my blower motor was working fine then just quit. was working fine when i turned the truck off them 20 mins later started her back up and blower was not working. i checked the fuse and it looked good. i can find the relays. does anyone know where there at? or any ideas of what might be wrong? thanks
On my truck, if the key switch does not spring back all the way to the RUN position... the fan does not work. This is more of a cold weather problem with my truck.
 
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Old Jun 5, 2010 | 11:03 AM
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There are no relays, only the 30 amp fuse.

Besides what has already been mentioned above, check the blower motor resistor and switch. If it works on high but not other speeds it's the resistor etc...
 
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Old Jun 6, 2010 | 07:23 AM
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i also noticed the blower motor quit and the blinkers stopped at the same time. my flashers are working. could it be the ignition switch?
 
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Old Jun 6, 2010 | 09:05 AM
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These threads are worth reading

https://www.ford-trucks.com/forums/9...d-weather.html

https://www.ford-trucks.com/forums/8...cal-thing.html

Jim
 
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Old Jun 7, 2010 | 12:50 PM
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what i have noticed is i lost blower motor, blinkers and back up lights all at the same time. any ideas.
 
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Old Jun 7, 2010 | 01:13 PM
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Defective or misadjusted ignition switch, is the most likely culprit.

Turn the ignition lock cylinder back slightly and see if they work again.
 
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Old Jun 7, 2010 | 01:34 PM
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how do you realign the switch. i put a new switch in and still nothing.
 
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Old Jun 8, 2010 | 12:26 PM
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i found the problem. i looked behind the fuse box and found a burnt and shorted out wire.
 
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Old Jun 9, 2010 | 05:24 PM
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Thanks for letting us know what it was. That is a atypical problem that you don't see everyday.

Just for completion sake, to adjust the ignition switch, you loosen up the screws that hold the ignition switch to the steering column and adjust it by moving it up or down, then retighten.
 
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Old Jun 9, 2010 | 06:29 PM
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New switches come with a alignment pin installed. You are supposed to leave the pin in place, put the switch on loosely, hook the actuator rod into the switch, and then tighten the switch. I believe this is all done while the key is in the off position, but the instructions should tell you for sure.
 
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Old Jun 9, 2010 | 07:30 PM
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I've replaced this switch on my '83. It's easy. Just read the directions.
 
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