Using An Ammeter With Current Measuring Probe

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

Remove driver door ECU from driver door armrest. See DRIVER DOOR OR FRONT PASSENGER DOOR ELECTRONIC CONTROL UNIT under REMOVAL & INSTALLATION.
Backprobing, connect current measuring probe of ammeter to driver door ECU 25-pin electrical harness connector terminal No. 25. Turn ignition on and place driver door power window switch in DOWN position. See Fig 2.
Current flow should be about 7 amps as window is going down and increase up to about 14.5 amps or more when the window stops. If current flow is as specified, replace driver door ECU. If current flow is not as specified, replace power window motor.

Fig 1: Testing Driver Door One Touch Power Window Circuit Using An Ammeter

Fig 2: Testing Driver Door One Touch Power Window Circuit Using An Ammeter With Current Measuring Probe