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Power Window System Current Test: Tacoma

  1. Disconnect driver's power window switch connector. Connect positive lead of ammeter to driver's power window switch connector (harness side) terminal No. 4 (Blue Green wire). See Figure.
  2. Connect ammeter negative lead to negative terminal of 12-volt battery. Turn ignition switch to ON position. Connect a jumper wire from positive battery terminal to driver's power window switch connector (harness side) terminal No. 9 (Blue/Red wire).
  3. As driver's window is lowered, current should be about 7 amps. When window operation is stopped, current should increase to about 14.5 amps or more. If current is as specified, replace driver's power window switch. If current is not as specified, check and repair appropriate circuit.
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