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
47,625 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

Check out the images (below). Please let us know what you find. We are interested to see what it is.

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Monday, May 15th, 2023 AT 1:20 PM

DALE PUTMAN

MEMBER
3 POSTS

Thank you for the help, sorry it took so long to answer you. I have been getting flustered because I cannot find one. I have tried internet auto parts and all I get is discontinued and out of stock, any ideas?

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Friday, May 19th, 2023 AT 8:06 AM

KEN L