1995 Lexus ES 300FACTORY OEM SERVICE PROCEDURE

Using An Ammeter

  1. Disconnect the connector from the master switch.
  2. Connect the positive (+) lead from the ammeter to terminal 3 on the wire harness side of the connector and the negative (-) lead to negative terminal of the battery. See Fig 1.
  3. Connect the positive (+) lead from the battery to terminal 6 on the wire harness side of the connector. See Fig 1.
  4. As the window goes down, check that the current flow is approximately 7 A. See Fig 2.
    5. NOTE: The circuit breaker opens some 4-40 seconds after the window stops going down, so that a check must be made before the circuit breaker operates.
  5. Check that the current increases up to approximately 14.5 A or more when the window stops going down. If operation is not as specified, replace the master switch.
Fig 1: Testing One Touch Power Window System (1 Of 2)
G00148036Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.

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