A/C Blend Door Actuator new replacement does not Move?

DALE PUTMAN

MEMBER
2000 BUICK LESABRE
3.7L
6 CYL
2WD
AUTOMATIC
187,000 MILES

I have cold air passenger side heat drivers' side so as I saw on u-tube ordered blend door actuator. Hooked it up and the center that is supposed to turn in order to move the lever does not move. I then checked the plug in going to the actuator. #5 positive, #6 #7 #9 #10 negative when touching #5 and #6, #5 and #7 I get 14.66 volts. When touching #5 and #9 I get 9.32 volts. When touching #5 and #10 I get 9.62 volts. These readings are on hot or cold, nothing changes or moves. I figured that going from hot to cold the readings should change, correct? If it's supposed to the Where does the wiring to the actuator come from and how do I check it?

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,895 POSTS

If the power and grounds are good, I would replace the programmer here is the wiring diagrams and the instructions on how to replace it. You might need to get a used unit.

Here is a guide to help test the circuits:

https://www.2carpros.com/articles/how-to-check-wiring

The programmer is used to control the operation of the HVAC system. The programmer/Instrument Panel Module (IPM) is located behind the instrument panel compartment door. The heater and A/C control assembly allow the vehicle operator to communicate with the IPM. The IPM is the component which monitors the HVAC system status and can adjust to meet the requirement set by the operator of the vehicle. The heater and A/C control includes buttons to select operating modes, a fan speed increase/decrease control, the rear defog control button, and a vacuum fluorescent display panel. When the park lamps or headlamps are turned on, the buttons are illuminated.

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