Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

Heater fan speed controll

Waynefp's Avatar
Visiting Guest

Posts: n/a

12-03-03, 12:35 PM   #1  
Heater fan speed controll

1992 GMC Sunoma V6 2.something engine with airconditioning question where is the heater speed controll block with the 3 little coils on it Located and is there a diagram avable?

Sponsored Links
Desi501's Avatar

Join Date: Oct 2003
Posts: 2,207

12-03-03, 01:53 PM   #2  
The thingy with the three little coils is the blower resistor. It is located in the A/C box between the blower and the evaporator. I don't know what diagram your referring to but if you want to see if it's the problem use a diode test light that shows power or ground and probe the plug while changing speed and you should find the ground (possibly power) moving to each different wire with each speed change. If you can find the signal for all speeds, the resistor is bad.

Search this Thread