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Power Window System Current Test: Corolla

  1. Disconnect driver's power window switch connector. Connect positive lead of ammeter to driver's power window switch connector (harness-side) terminal No. 1.
  2. Connect ammeter negative lead to negative terminal of 12-volt battery. Connect jumper wire from positive battery terminal to driver's power window switch connector terminal No. 5. 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 switch. If current is not as described, check and repair appropriate circuit.
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