Step 3 - Inspect One-Touch Power Window System Circuit Current (Using An Ammeter With A Current-Measuring Probe)

WARNING: This page is about a different car, the 2002 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

Remove the master switch with connector connected.
Attach a current-measuring probe to terminal 9 of the wire harness.

Fig 1: Probe Testing 2-Door Model One Touch Power Window Circuits (1 Of 2)

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Turn the ignition switch ON and set power window switch in the down position.
As the window goes down, check that the current flow is approximately 7 A.

NOTE: The circuit breaker opens some 4 to 40 seconds after the window stops going down, so that check must be done before the circuit breaker operates.

Fig 2: Probe Testing 2-Door Model One Touch Power Window Circuits (1 Of 2)

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.