For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Wiper Switch Ignition Supply | 1 | 1 | -- | --
Wiper Motor High Speed | 1 | 3 | 2 | --
Wiper Motor Ground | -- | 1 | -- | --
1. Wipers Inoperative All Modes 2. Wipers Always On 3. High Speed Wipers Inoperative

### Circuit/System Description

High speed wiper motor operation is controlled by suppling ignition voltage through the wiper switch to the wiper motor high speed circuit.

### Reference Information

#### Schematic Reference

Wiper/Washer Schematics

#### Connector End View Reference

Wiper/Washer Connector End Views

#### Description and Operation

Wiper/Washer System Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

### Circuit/System Verification

Ignition ON, verify the low speed windshield wipers operate.

⇒ | If the windshield wiper low and high speed functions are inoperative, refer to Wipers Inoperative - All Modes.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the windshield wiper motor.
2. Ignition ON wiper switch in the high position, verify that a test lamp illuminates between the wiper motor high speed circuit terminal 6 and ground.

⇒ | If the test lamp does not illuminate, test the wiper motor low speed circuit terminal 6 for an open/high resistance. If the circuit tests normal replace the wiper switch.

3. If all circuits test normal replace the windshield wiper motor.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Windshield Wiper and Washer Switch Replacement
2. Windshield Wiper Motor Replacement