Help with AC please.

[jonnyukon]

Hey sorry OP don't mean to post jack but I have a 95 and I'm having the same problems as u ... I have power on the ground side of the blower... Weird... And I only have power to the blower on the two medium speeds . No power on high no power on low ... And also neither does my temp or vent motors r working... But I have power to them and they vary the voltage when I operate the hvac controls... So I'm thinking we might have a ground problem... Someone said the motors and the blower use the same grounding point. Oh where oh where might that common grounding point be?

 

[jonnyukon]

http://www.gmtruckcentral.com/wiringdiagrams/1995 GMC Yukon/Fig 1 AC Circuit.pdf

I found this... This has locations of common grounds

 

[jonnyukon]

Yup I grounded the blower motor to a good ground and everything worked .