Preliminary Checks
Verify customer concern by operating windows to duplicate condition. Ensure battery is fully charged. Ensure windows are properly aligned. Check the following for possible cause of malfunction
- Blown fuse or faulty circuit breaker.
- Loose or corroded connectors.
- Open or shorted power supply.
- Poor ground connections.
- Damaged window control switch.
- Damaged window motor.
Verify customer concern by operating window to duplicate condition. Ensure window in question is properly aligned. Check the following for possible cause of malfunction
- Damaged track or regulator mechanism.
- Malfunctioning window motor.
- Open or shorted circuit.
Verify customer concern by operating window to duplicate condition. Ensure battery is fully charged. Check the following for possible cause of malfunction
- Damaged master window switch.
- Open or shorted power supply.
- Poor ground connections.
- Faulty one-touch window down relay.
POWER WINDOW SWITCH
Remove window switch from vehicle. See POWER WINDOW SWITCH R & I under REMOVAL & INSTALLATION. Using ohmmeter, check for continuity between switch terminals in specified switch positions. See appropriate POWER WINDOW SWITCH TESTING table. (Scheme 6), (Scheme 7) or (Scheme 8). Replace power window switch if it does not test as specified.
| Switch Position | Continuity Between Terminals |
|---|---|
| Neutral | C74a-3, C74a-4, C74a-5, C74a-6, C74a-9, C74a-15, C74a-16, C74b-2, C74b-3, C74b-4 |
| Left Front Up | C74a-9 & C74b-2 |
| Left Front Down | C74a-9 & C74b-3; C74a-11 & C74b-2 |
| Right Front Up | C74a-3 & C74b-2; C74a-4 & C74b-3 |
| Right Front Down | C74a-4 & C74b-2; C74a-3 & C74b-3 |
| Left Rear Up | C74a-15 & C74b-4; C74a-16 & C74b-3 |
| Left Rear Down | C74a-16 & C74b-4; C74a-15 & C74b-3 |
| Right Rear Up | C74a-5 & C74b-4; C74a-6 & C74b-3 |
| Right Rear Down | C74a-5 & C74b-3; C74a-6 & C74b-4 |
POWER WINDOW SWITCH TESTING
Scheme 6
Scheme 7
| Switch Position | Continuity Between Terminals No. |
|---|---|
| Neutral | 1 & 3; 1 & 6; 2 & 4 |
| Up | 1 & 2; 3 & 7; 2 & 4 |
| Down | 1 & 6; 2 & 7; 2 & 4 |
POWER WINDOW SWITCH TESTING
Scheme 8
POWER WINDOW MOTOR
Remove window motor from vehicle. See POWER WINDOW MOTOR R & I under REMOVAL & INSTALLATION. Using fused jumper wires, connect a fully charged battery to motor terminals. Observe motor. Motor should operate smoothly. Reverse leads. Motor should operate in reverse direction. Replace window motor if it does not operate as specified.