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Power Window System Current Test: Corolla

  1. Disconnect driver's power window master switch harness connector. Connect positive lead of ammeter to terminal No. 5 (Green wire) at driver's power window master switch harness connector (harness side) .
  2. Connect ammeter negative lead to negative terminal of 12-volt battery. Connect jumper wire between positive battery terminal and terminal No. 1 (Yellow wire) at driver's power window master switch harness connector. See Figure.
  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 described, replace driver's power window master switch. See POWER WINDOW SWITCH  under REMOVAL & INSTALLATION. If current is not as described, check and repair appropriate circuit.
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