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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (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

Pinpoint Test E: The Washer Pump Is Inoperative

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
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 CIRCUIT 1205 (BK) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Washer Pump Motor C137
      • Fig 1: Measuring Resistance Between Windshield Washer Pump C137-2, Circuit 1205 (BK), Harness Side & Ground
      GF0000101Courtesy of FORD MOTOR CO.
    • Measure the resistance between the windshield washer pump C137-2, circuit 1205 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  E2.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  2. E2 CHECK THE WINDSHIELD WASHER PUMP FOR VOLTAGE 
    • Key in ON position.
      • Fig 2: Checking Windshield Washer Pump For Voltage
      GF0011480Courtesy of FORD MOTOR CO.
    • Measure the voltage between the windshield washer pump C137-1, circuit 941 (BK/WH) harness side and ground while pressing the windshield wiper/washer switch to the WASH position.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new washer pump. REFER to Washer Pump and Reservoir .
    2. NO  : Go to  E3.
  3. E3 CHECK THE WINDSHIELD WIPER/WASHER SWITCH 
    • Key in OFF position.
    • Disconnect: Windshield Wiper/Washer Switch C2137
    • Carry out the windshield wiper/washer switch component test. Refer to COMPONENT TESTING .
    • Does the windshield wiper/washer switch pass the component test? 
    1. YES  : Go to  E4.
    2. NO  : INSTALL a new windshield wiper/washer switch. REFER to Wiper/Washer Switch .
  4. E4 CHECK CIRCUIT 680 (LB/OG) FOR AN OPEN CIRCUIT 
    • Disconnect: Windshield Wiper Motor C125
      • Fig 3: Measuring Resistance Between Windshield Wiper/Washer Switch C2137-5, Circuit 680 (LB/OG)
      GF0014869Courtesy of FORD MOTOR CO.
    • Measure the resistance between the windshield wiper/washer switch C2137-5, circuit 680 (LB/OG), harness side and windshield wiper motor connector C125-12, circuit 680 (LB/OG), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  E5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. E5 CHECK CIRCUIT 941 (BK/WH) FOR AN OPEN CIRCUIT 
      Fig 4: Measuring Resistance Between Windshield Wiper Motor Connector C125-7, Circuit 941 (BK/WH)
      GF0014871Courtesy of FORD MOTOR CO.
    • Measure the resistance between the windshield wiper motor connector C125-7, circuit 941 (BK/WH), harness side and the windshield washer pump connector C137-1, circuit 941 (BK/WH), 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 WINDSHIELD WIPER MOTOR OPERATION 
    • Disconnect the windshield wiper motor connectors.
    • Check for:
      • corrosion.
      • pushed-out pins.
    • Connect all the windshield 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 . TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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