F 450 4WD Super Duty V10-6.8L VIN D (2004)
Wiper Motor: Testing and Inspection
Rear Window Wiper Motor
REAR WINDOW WIPER MOTOR
CAUTION: Do not handle the rear window wiper motor abusively when diagnosing the wiper operations. Failure to follow this caution may
result in damage to the motor magnets and will make the rear window wiper motor inoperative. Rough handling of new rear window wiper
motors may also damage the motor magnets.
NOTE:
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Rear window wiper motor component test is carried out to determine if wiper motor and module are functional and not in software safe mode.
Refer to Principles of Operation for software safe mode parameters.
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Battery voltage must remain within 10 to 15 V DC to carry out test and keep wiper motor from entering its software safe mode.
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When connecting the power and ground test leads to the rear wiper motor terminals, care must be taken to not short terminals between power and
ground, as well as insuring the logic ground, pin 3, is always securely connected to prevent permanent rear window wiper motor module damage.
If the rear window wiper motor does not pass any of the following tests, install a new rear window wiper motor.
Use the SABRE Premium Battery and Electrical System Tester to test the rear window wiper motor.
Disconnect the rear window wiper motor. Connect the (1) green lead from the (2) SABRE to the battery negative (-) post. Connect the red lead (3) from
the SABRE to the wiper motor (4) component side connector ground pins 1 an 2 (3). Connect battery positive cable (5) to wiper motor (4) component
side connector battery and logic positive pins 3 and 4 (5).
On Mode
Test the on mode by connecting a separate set of test leads from battery ground (-) post to windshield wiper motor (4) component side pins 6 and 7
(6). When these pins are grounded, the rear window wiper motor operation should now be in on mode.
Washer Pump Relay (Integral)
Test the rear window wiper motor internal washer relay function by measuring the voltage between wiper motor (4) component side pin 5 (7), and
ground. When wash command input pin 6 (7) is grounded, measured voltage should read 10 volts or greater.
