Pinpoint Test Ag: The Washer Fluid Level Low Message Is Inoperative/Always On

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .

AG1 DETERMINE THE CONDITION
- Ignition ON.
- Does the LOW WASHER FLUID LEVEL message display all the time?
  - Yes : GO to AG5.
  - No : GO to AG2.
AG2 CHECK THE LOW WASHER FLUID INDICATOR OPERATION
- Ignition OFF.
- Disconnect: Washer Fluid Level Switch C138.
- Connect a fused jumper wire between the washer fluid level switch C138-1, circuit CMC20 (VT), harness side and ground.
  
  Fig 1: Connecting Fused Jumper Wire Between Washer Fluid Level Switch C138-1 And Ground
  Courtesy of FORD MOTOR CO.
- Ignition ON.
- Wait one minute.
- Observe the low washer fluid indicator.
- Is the low washer fluid indicator on?
  - Yes : REMOVE the jumper wire. GO to AG3.
  - No : REMOVE the jumper wire. GO to AG4.
AG3 CHECK THE WASHER FLUID LEVEL SWITCH GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the washer fluid level switch C138-2, circuit GD123 (BK/GY), harness side and ground.
  
  Fig 2: Measuring Resistance Between Washer Fluid Level Switch C138-2, Circuit GD123 (BK/GY), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  - Yes : INSTALL a new washer fluid level switch or reservoir as necessary. TEST the system for normal operation.
  - No : REPAIR circuit GD123 (BY/GY) for an open. TEST the system for normal operation.
AG4 CHECK THE WASHER FLUID LEVEL INPUT CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: IPC C220.
- Measure the resistance between the IPC C220-9, circuit CMC20 (VT), harness side and the washer fluid level switch C138-1, circuit CMC20 (VT), harness side.
  
  Fig 3: Measuring Resistance Between IPC C220-9 And Washer Fluid Level Switch C138-1, Circuit CMC20 (VT), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  - Yes : GO to AG5.
  - No : REPAIR the circuit. TEST the system for normal operation.
AG5 CHECK THE WASHER FLUID SWITCH
NOTE: Verify that the washer fluid reservoir is full and that the key has been cycled at least once prior to continuing with the pinpoint test.
- Ignition OFF.
- Disconnect: Washer Fluid Level Switch C138.
- Ignition ON.
- Wait one minute.
- Observe the low washer fluid message.
- Did the low washer fluid indicator turn off?
  - Yes : INSTALL a new washer fluid level switch reservoir as necessary. REFER to WIPERS AND WASHERS . TEST the system for normal operation.
  - No : GO to AG6.
AG6 CHECK THE WASHER FLUID INPUT CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: IPC C220.
- Measure the resistance between the IPC C220-9, circuit CMC20 (VT), harness side and ground.
  
  Fig 4: Measuring Resistance Between IPC C220-9, Circuit CMC20 (VT) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
  - Yes : GO to AG7.
  - No : REPAIR circuit CMC20 (VT) for a short to ground. TEST the system for normal operation.
AG7 CHECK FOR CORRECT IPC OPERATION
- Disconnect the IPC connector.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the IPC connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
  - Yes : INSTALL a new IPC. REFER to INSTRUMENT PANEL CLUSTER (IPC) . TEST the system for normal operation.
  - No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.