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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2575 (Wiper System & Washer System) >> Diagnostic Tests >> Wipers and Washers >> Pinpoint Tests >> Pinpoint Test E: The Washer Pump is Inoperative

Pinpoint Test E: The Washer Pump is Inoperative

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Wipers and Washers for schematic and connector information.

Normal Operation 

When the wash function is selected by the operator, the multi-function switch grounds circuit 680 (LB/OG) to the windshield wiper motor. The windshield wiper motor interprets this ground signal and energizes the internal washer relay. Voltage is sent to the washer pump from the windshield wiper motor through circuit 941 (BK/WH). The windshield washer pump motor is grounded through circuit 57 (BK). The multi-function switch is grounded through circuit 57 (BK).

This pinpoint test is intended to diagnose the following:

PINPOINT TEST E: THE WASHER PUMP IS INOPERATIVE 

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. E1 CHECK THE WASHER PUMP MOTOR FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Windshield Washer Pump C137
    • Key in ON position.
      • Fig 1: Checking Washer Pump Motor For Voltage
      GF0011480Courtesy of FORD MOTOR CO.
    • Measure the voltage between windshield washer pump C137-1, circuit 941 (BK/WH), harness side and ground while depressing the multi-function switch to the WASH position.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  E2.
    2. NO  : Go to  E3.
  2. E2 CHECK CIRCUIT 57 (BK) FOR GROUND 
    • Measure the resistance between the windshield washer pump C137-2, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new windshield washer pump. REFER to Washer Pump and Reservoir .
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. E3 CHECK CIRCUIT 941 (BK/WH) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Windshield Wiper Motor C125
      • Fig 2: Checking Circuit For Open
      GF0011481Courtesy of FORD MOTOR CO.
    • Measure the resistance between windshield wiper motor C125-7, circuit 941 (BK/WH), harness side and windshield washer pump C137-1, circuit 941 (BK/WH), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  E4.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. E4 CHECK THE MULTI-FUNCTION SWITCH 
    • Key in OFF position.
    • Disconnect: Multi-function Switch C202b
    • Preform the Multi-function Switch Component Test.
    • Does the multi-function switch pass the component test? 
    1. YES  : Go to  E5.
    2. NO  : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES article.
  5. E5 CHECK CIRCUIT 680 (LB/OG) FOR AN OPEN 
      Fig 3: Checking Circuit For Open
      GF0013268Courtesy of FORD MOTOR CO.
    • Measure the resistance between windshield wiper motor C125-12, circuit 680 (LB/OG), harness side and multi-function switch C202b-2, circuit 680 (LB/OG), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  E6.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  6. E6 CHECK FOR CORRECT WIPER MOTOR OPERATION 
    • Disconnect all wiper motor connectors.
    • Check for:
      • corrosion.
      • pushed-out pins.
    • Connect all wiper motor connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new windshield wiper motor. REFER to Wiper Motor .
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
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