LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 1999 >> SC 300 >> Repair and Diagnosis >> Body & Frame >> Power Windows >> Circuit Tests >> Power Window Motor Circuit
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Power Window Motor Circuit

Disconnect power window motor harness connector. Using DVOM, measure voltage between ground and appropriate terminals of passenger's switch. See Fig 1. Ensure voltage is as specified. See POWER WINDOW MOTOR CIRCUIT SPECIFICATIONS  table. If voltage is not as specified, repair circuits as necessary. See WIRING DIAGRAMS .

POWER WINDOW MOTOR CIRCUIT SPECIFICATIONS

Tester Connection Condition Circuit Value
1 & Ground Ignition Switch In ON Position; Master Switch UP Or OFF No Voltage
1 & Ground Ignition Switch In ON Position; Master Switch DOWN Battery Voltage
1 & Ground Ignition Switch In ON Position; Master Switch UP Or OFF No Voltage
1 & Ground Ignition Switch In ON Position; Master Switch DOWN Battery Voltage
2 & Ground Ignition Switch In ON Position; Master Switch DOWN Or OFF No Voltage
2 & Ground Ignition Switch In ON Position; Master Switch UP Battery Voltage
2 & Ground Ignition Switch In ON Position; Master Switch DOWN Or OFF No Voltage
2 & Ground Ignition Switch In ON Position; Master Switch UP Battery Voltage
Fig 1: Identifying Power Window Motor Harness Connector Terminals
G99J51507Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002