2000 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Test 4: Lock-Out Function Inoperative

Disconnect master switch assembly connector. Using a test light connected to ground, backprobe master switch assembly connector Dark Blue wire terminal. If test light does not illuminate, replace master switch assembly. See WINDOW SWITCHΒ  under REMOVAL & INSTALLATION. Recheck system operation. If test light illuminates, repair short to power in Dark Blue wire between master switch assembly connector and window switches. See WIRING DIAGRAMSΒ  . Recheck system operation.

Factory Service Tools

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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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