Quote Originally Posted by Turbov6Bryan View Post
Sounds like whatever powers of the HVAC is not powering up your control module maybe a bad ground may be a disconnected connector it sounds like it's just missing power

That's what I feared, I hate wiring but I think its time to hit the old wire schematics and see if they share a ground of some kind.


Quote Originally Posted by BLACKMARAUDER04 View Post
Is the fuse working? Is the fuse blowing out?
If this is the case, check for a short in your rear view mirror wiring.
The monochrome 3 wire plug.

Fuse is good.