Master Control Switch

1972 Chevrolet Impala 2D Convertible, 5.7L Eng VIN L, Not Available TransSECTION 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 blockout switch.

With power available, by-pass switch using a jumper wire between feed terminal and one of the motor lead terminals. Test each motor terminal, if each circuit operates properly, check switch connections or replace switch.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.