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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 511 (Wiper System & Washer System -- F250-F550 Super Duty) >> Diagnosis And Testing >> Wipers and Washers >> Pinpoint Tests >> Pinpoint Test B: The Wipers Stay On Continuously >> Pinpoint Test B: The Wipers Stay On Continuously

Pinpoint Test B: The Wipers Stay On Continuously

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. B1 CHECK THE MULTI-FUNCTION SWITCH 
    • Key in OFF position.
    • Disconnect: Multi-function Switch C202b.
    • Carry out the multi-function switch component test.
    • Did the multi-function switch pass the component test? 

    Yes  : Go to B2.

    No  : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES .

  2. B2 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
    • Measure the resistance between multi-function switch C202b-6, circuit 57 (BK), harness side and ground.
      Fig 1: Checking Circuit 57 (BK) For Open
      G04646495Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes  : Go to B3.

    No  : REPAIR the circuit. TEST the system for normal operation.

  3. B3 CHECK CIRCUITS 56 (DB/OG), 58 (WH), 61 (YE/RD) AND 63 (RD) FOR SHORTS 
    • Disconnect: Windshield Wiper Motor C125.
    • Using the following table, measure the resistance between windshield wiper motor C125 harness side and ground:
      WINDSHIELD WIPER MOTOR CHART

      Windshield Wiper Motor C125 Ground
      Pin 10, circuit 56 (DB/OG) Ground
      Pin 11, circuit 58 (WH) Ground
      Pin 1, circuit 61 (YE/RD) Ground
      Pin 9, circuit 63 (RD) Ground
      Fig 2: Checking Circuits 56 (DB/OG), 58 (WH), 61 (YE/RD) And 63 (RD) For Shorts
      G04646496Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes  : Go to B4.

    No  : REPAIR the circuit(s) in question. TEST the system for normal operation.

  4. B4 CHECK FOR CORRECT WIPER MOTOR OPERATION 

Yes  : INSTALL a new windshield wiper motor. REFER to WIPER MOTOR  in this section.

No  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.