2000 Lexus SC 400FACTORY OEM SERVICE PROCEDURE

Master Switch Illumination

Remove master switch. Apply battery voltage across master switch terminals No. 4 and 8. See Figure. With window lock switch in UNLOCK position, indicator lights on all switches should illuminate. With window lock switch in LOCK position, indicator lights on master passenger's switches should turn off. If indicator lights do not operate as specified, replace master 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.