Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Driver's Master Window Switch
Measure voltage by backprobing between master window switch appropriate terminal and ground. Leave master window switch connected to wiring harness, unless indicated. See POWER WINDOW SWITCH VOLTAGE TEST (1 OF 2) table. If voltage is as specified, go to CONTINUITY CHECKS. If voltage is not as specified, repair affected circuit. See WIRING DIAGRAMS .
| Terminal No. (1) | Condition | Volts | ||||
|---|---|---|---|---|---|---|
| 1 | (2) At All Times | 10-14 | ||||
| 3 | (2) Ignition Switch In LOCK Position | Zero | ||||
| 3 | (2) Ignition Switch In ACC Or ON Position | 10-14 | ||||
| 6 | Ignition Switch ON, Window Lock Switch OFF | 10-14 | ||||
| 6 | Ignition Switch ON, Window Lock Switch ON | Zero | ||||
| 8 | Ignition Switch ON, Master Switch OFF | Zero | ||||
| 8 | Ignition Switch ON, Master Switch DOWN | More Than 9 | ||||
| 8 | Ignition Switch ON, Driver Window Glass Closed | Zero | ||||
| 8 | Ignition Switch ON, Master Switch AUTO DOWN | More Than 9 | ||||
| 8 | Ignition Switch ON, Driver Window Glass Opened | Zero | ||||
| 12 | Power Window Operating | About 5.5 | ||||
| 13 | Master Switch DOWN, Driver Window Glass Opened | Below 1 | ||||
| 18 | Ignition Switch ON | 2.5 | ||||
| 20 | Ignition Switch ON, Master Switch OFF | Zero | ||||
| 20 | Ignition Switch ON, Master Switch DOWN | More Than 9 | ||||
| 20 | Ignition Switch ON, Driver Window Glass Closed | Zero | ||||
| 20 | Ignition Switch ON, Master Switch AUTO UP | More Than 9 | ||||
| 20 | Ignition Switch ON, Driver Window Glass Opened | Zero | ||||
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With master window switch still connected, check continuity by backprobing between master window switch terminal No. 10 and ground. Disconnect master window switch and check continuity between master window switch terminal No. 9 and ground. Continuity should be present at both measurements at all times. If continuity is not present at either measurement, repair affected circuit. See WIRING DIAGRAMS . If continuity is present at both measurements, circuits are okay at this time.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.