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Heat/AC not working

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Old Feb 15, 2021 | 09:00 PM
  #1  
Mikey21's Avatar
Mikey21
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Heat/AC not working

My blower motor dosnt even attempt to turn on, I’ve replaced the resistor, and the motor, any advice, also could extremely cold weather affect it in any way
 
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Old Feb 15, 2021 | 09:45 PM
  #2  
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DarkOverCast
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I'm sure you've checked the fuses, but it's possible the wiring melted somewhere out of the connector or made a bad connection or the speed selector switch is bad.

Maybe lonewolf will see this and post a wiring diagram for you and maybe you can find out where the power is vanishing.

I recommend to clip the power wire at the blower motor, add in a relay with a 30 amp fuse off the battery, and use the original power wire to trip said relay. Ground must stay oem because that's the side that does the speed switching.
 
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Old Feb 15, 2021 | 10:49 PM
  #3  
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I assume this is for 1990......



 
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