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Where does this black wire on the back of the HVAC go?
'78 US car This wire comes off the back bottom left of the HVAC controler as viewed from the drivers seat. Picture was taken from the drivers side footwell from the gas pedal area
The black on is a fibre optic line and should go into one of the switches in the HVAC unit most likely.
Hmm? but if is attached to the back corner of the controller already , why would the end that is off go back to the same contoller?
maybe I need to get the whole unit out and take a closer look.
Thanks for your help