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1978 car. Orange wire comes out of harness on drivers side fender at the front of master cylinder. I originally thought it was for the cruise but found out that's not it. Maybe the pump for windshield wiper pump?
See when that wire has power. Key on? Off? Headlights on? Throttle position? This is a great example of wiring diagram necessity.
My first thought is it's for the electric kickdown if the car had a TH400. Maybe the hood flapper.