Is the resistance less than 3 ohms?
Yes | INSTALL a new wiper relay. |
|---|---|
No | REPAIR the circuit. |
A11 CHECK THE WINDSHIELD WIPER MOTOR GROUND CIRCUIT FOR AN OPEN
Ignition OFF. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C1656-8 | C1656-6 |
Is the voltage greater than 11 volts?
Yes | GO to A12 |
|---|---|
No | REPAIR the circuit. |
A12 CHECK THE FAIL-SAFE HIGH SPEED WIPER GROUND CIRCUIT CONTROL
NOTICE: This pinpoint test step uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or 250-300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.
Ignition OFF. Disconnect Windshield Wiper Motor C1656 (if not previously disconnected). Connect:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C1656-8 | C1656-1 |
Ignition ON. Place the wiper/washer switch to the high speed setting and then off. Ignition OFF.
Does the test lamp illuminate when the wiper washer switch is in the high speed setting?
Yes | GO to A14 |
|---|---|
No | GO to A13 |
A13 CHECK THE FAIL-SAFE HIGH SPEED WIPER GROUND CIRCUIT FOR AN OPEN
NOTE: If steps A2-A12 did not identify the cause of the concern, a double fault may be present. After the fail-safe ground is diagnosed and repaired, it is necessary to check all operation modes and diagnose any symptom still present.
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.