1972 Chevrolet Brookwood 5.7L Eng VIN J, Not Available TransFACTORY OEM SERVICE PROCEDURE

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.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

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

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

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