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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1112 (Instrument Cluster (Ic), Message Center, And Warning Chimes) >> Diagnostic Tests >> Instrument Cluster (IC) and Warning Chimes >> Pinpoint Tests >> Pinpoint Test J: The Brake Warning Indicator is Never On >> Pinpoint Test J: The Brake Warning Indicator Is Never On

Pinpoint Test J: The Brake Warning Indicator Is Never On

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. J1 CHECK BRAKE WARNING OPERATION  
    • Apply the parking brake.
    • Key in ON position.
    • Does the brake warning indicator illuminate? 
    1. YES  : Go to  J5.
    2. NO  : Go to  J2.
  2. J2 CHECK THE PARKING BRAKE SWITCH 
    • Key in OFF position.
    • Disconnect: Parking Brake Switch C2015
      • Fig 1: Checking Parking Brake Switch
      GF0012792Courtesy of FORD MOTOR CO.
    • Connect a fused (5A) jumper wire between the parking brake switch C2015-1, circuit 162 (LG/RD), harness side and ground.
    • Key in ON position.
    • Does the brake warning indicator illuminate? 
    1. YES  : REMOVE the jumper wire. Go to  J3.
    2. NO  : REMOVE the jumper wire. Go to  J4.
  3. J3 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
    • Key in OFF position.
      • Fig 2: Checking Circuit 57 (BK) For An Open
      GF0012793Courtesy of FORD MOTOR CO.
    • Measure the resistance between the parking brake switch C2015-2, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new parking brake switch. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. J4 CHECK CIRCUIT 162 (LG/RD) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Instrument Cluster (IC) C220b
      • Fig 3: Checking Circuit 162 (LG/RD) For An Open
      GF0012794Courtesy of FORD MOTOR CO.
    • Measure the resistance between the instrument cluster (IC) C220b-9, circuit 162 (LG/RD), harness side and the parking brake switch C2015-1, circuit 162 (LG/RD), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  J8.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. J5 CHECK THE BRAKE FLUID SWITCH 
    • Disconnect: Brake Fluid Level Switch C124
    • Does the brake warning indicator illuminate? 
    1. YES  : Go to  J7.
    2. NO  : Go to  J6.
  6. J6 CHECK THE BRAKE FLUID LEVEL SWITCH CIRCUITS 531 (DG/YE) AND 512 (TN/LG) FOR A SHORT TOGETHER 
    • Key in OFF position.
    • Disconnect: Instrument Cluster (IC) C220b
      • Fig 4: Checking Brake Fluid Level Switch Circuits 531 (DG/YE) & 512 (TN/LG) For A Short Together
      GF0012795Courtesy of FORD MOTOR CO.
    • Measure the resistance between the instrument cluster (IC) C220b-19, circuit 531 (DG/YE), harness side and the instrument cluster (IC) C220b-20, circuit 512 (TN/LG), harness side.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  J8.
    2. NO  : REPAIR the circuits. TEST the system for normal operation.
  7. J7 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
      Fig 5: Checking Circuit 57 (BK) For An Open
      GF0012796Courtesy of FORD MOTOR CO.
    • Measure the resistance between the brake fluid level switch C124-1, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new master cylinder. REFER to HYDRAULIC BRAKE ACTUATION article. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  8. J8 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION 
    • Disconnect all the instrument cluster (IC) connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the instrument cluster (IC) 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 instrument cluster (IC). REFER to Instrument Cluster (IC) . 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. CLEAR the DTCs. REPEAT the self-test.
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