95 tahoe Blend doors

[vendo]

yes 3 wires brown and ground have voltage i didnt check the white one..if i started it would probably be 12volts

 

[vendo]

I had volt meter on brown and black and voltage changed..should i check the white and ground?

 

[vendo]

can i test the acuator some how?

 

[vendo]

i put 12v into my old one and it moves no problem..small motor.

 

[east302]

I had volt meter on brown and black and voltage changed..should i check the white and ground?

Yes, check both. One will be a battery and the other will be a signal and is what changes based on the dial setting. I want to say it (the signal one) ranged from 1 to 12V or maybe it was 1 to 5. Something like that, but definitely a noticeable range that you can see on the meter.


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[vendo]

so the white one and the ground for the signal and turn dial..will try that tues after work..

 

[east302]

Went and checked mine (1998 model). White to ground is signal and varies from 12V (face vent panel dial setting or all the way counterclockwise) to about 0.5V on full defrost. It was around 6V at the 12 o’clock dial position.

Brown to ground is battery and was always 12V or so. Doesn’t change with dial position.


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[vendo]

what do i do if there is no signal from that wire?

 

[east302]

It would point to an issue with the control panel or damaged wiring in between it and the actuator.


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[vendo]

i just bought a new control head...