Does anyone have Auto HVAC in their Envoy or Trailblazer AND a rear-view mirror with temp display?
I have manual HVAC and a rear-view mirror with outside temp displayed in the mirror, but was considering using junkyard parts to upgrade to auto HVAC. (I know - a lot of wiring, but It's an interesting project, thinking about it, and I have experience adding wires/connectors and modules etc. to upgrade!)
My question is to determine if GM ever fed the ambient air temp sensor to BOTH devices.
In the factory wiring schematics, I see EITHER the rear-view mirror wiring (temp sensor runs back to the rear fusebox then out to the roof harness and to the rearview mirror), OR the Auto HVAC wiring (air temp sensor seems to go directly from the under-hood C105 to the Auto HVAC control module.
I wonder, if both the mirror AND the Auto HVAC controller have the same air temp sensor connected, if the measuring circuits of both devices would be offset due to both of their inputs being effectively joined together in parallel by the same sensor.
Can anyone confirm they have both temp displays in their truck?
I have manual HVAC and a rear-view mirror with outside temp displayed in the mirror, but was considering using junkyard parts to upgrade to auto HVAC. (I know - a lot of wiring, but It's an interesting project, thinking about it, and I have experience adding wires/connectors and modules etc. to upgrade!)
My question is to determine if GM ever fed the ambient air temp sensor to BOTH devices.
In the factory wiring schematics, I see EITHER the rear-view mirror wiring (temp sensor runs back to the rear fusebox then out to the roof harness and to the rearview mirror), OR the Auto HVAC wiring (air temp sensor seems to go directly from the under-hood C105 to the Auto HVAC control module.
I wonder, if both the mirror AND the Auto HVAC controller have the same air temp sensor connected, if the measuring circuits of both devices would be offset due to both of their inputs being effectively joined together in parallel by the same sensor.
Can anyone confirm they have both temp displays in their truck?