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Home >> Chevrolet >> 1977 >> Vega Base, 2D Hatchback, Automatic Trans >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows >> Window Controls - Electric >> Testing >> Master Control Switch

Master Control Switch

Check power feed RED-WHITE wire at switch, if power fails, test wire between relay and master switch.

NOTE: If power fails at master switch on Cadillac models, check blowout switch.