86’ fan blower speed

[Eric Zeman]

Question for you guys. On my 86 Cutlass, I couldn’t get the blower fan to speed up. Then while I was driving it started to speed up for a second, then slow down. It did this a few times, what could be the cause?

 

[57 Handyman]

Eric, in my 87 El Camino, the blower motor speed is controlled via a resistor that is mounted on the top of the AC housing in the engine compartment.

https://www.opgi.com/cooling-heating/heater-blower-motors/blower-motor-resistors/blower-motor-resistor-1978-81-malibumonteelco-4-prong-wac-l241248.html

 

[Eric Zeman]

Eric, in my 87 El Camino, the blower motor speed is controlled via a resistor that is mounted on the top of the AC housing in the engine compartment.

https://www.opgi.com/cooling-heating/heater-blower-motors/blower-motor-resistors/blower-motor-resistor-1978-81-malibumonteelco-4-prong-wac-l241248.html

So I changed this today and it still didn’t work. Any other ideas on what could be causing this?

 

[ELCAM]

Check the ground wire, try jumping the ground terminal to the - battery terminal.

If you jump the 12ga purple wire on the blower motor to the battery + does it run faster?

 

[Eric Zeman]

Check the ground wire, try jumping the ground terminal to the - battery terminal.

If you jump the 12ga purple wire on the blower motor to the battery + does it run faster?

 

[Eric Zeman]

I will try that tomorrow and see what it does.