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Pinpoint Test H: The Demand Lighting Is Inoperative

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.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. H1 CHECK THE IC DTCs FROM BOTH THE CONTINUOUS AND THE ON-DEMAND SELF-TESTS 
    • Use the recorded results from the IC continuous and on-demand self-test.
    • Is DTC B1315 present? 
    1. YES  : Go to  H2.
    2. NO  : Go to  H4.
  2. H2 CHECK THE BATTERY SAVER RELAY (DTC B1315) 
    • Disconnect: Battery Saver Relay
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: IC Self-Tests
    • CLEAR the DTCs, and repeat the IC self-tests.
    • Is DTC B1315 still present? 
    1. YES  : Go to  H3.
    2. NO  : INSTALL a new battery saver relay. RUN the on-demand self-test (required to clear certain DTCs). CORRECT any unresolved DTCs. CLEAR all DTCs. TEST the system for normal operation.
  3. H3 CHECK CIRCUIT 1005 (VT/OG) FOR SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: IC C220a
      • Fig 1: Checking Circuit 1005 (VT/OG) For Short To Voltage
      GF0012931Courtesy of FORD MOTOR CO.
    • Measure the voltage between the IC C220a-1, circuit 1005 (VT/OG), harness side and ground.
    • Is any voltage present? 
    1. YES  : REPAIR the circuit. RUN the on-demand self-test (required to clear certain DTCs). CORRECT any unresolved DTCs. CLEAR all DTCs. TEST the system for normal operation.
    2. NO  : Go to  H9.
  4. H4 CHECK THE BATTERY SAVER RELAY (NO DTCs) 
    • Key in OFF position.
    • Disconnect: Battery Saver Relay
    • Install a known good relay and open any door.
    • Do the courtesy lamps illuminate? 
    1. YES  : REMOVE the known good relay. INSTALL a new battery saver relay. TEST the system for normal operation.
    2. NO  : REMOVE the known good relay. Go to  H5.
  5. H5 CHECK CIRCUIT 54 (LG/YE) FOR AN OPEN (BATTERY SAVER RELAY) 
      Fig 2: Checking Circuit 54 (LG/YE) For An Open (Battery Saver Relay)
      GF0012934Courtesy of FORD MOTOR CO.
    • Connect a fused (5A) jumper wire between the battery saver relay pin 3, circuit 1420 (YE/LB), harness side and the battery saver relay pin 5, circuit 54 (LG/YE), harness side.
    • Operate the demand lighting function on an interior lamp.
    • Does the lamp illuminate? 
    1. YES  : REMOVE the jumper wire. Go to  H6.
    2. NO  : REMOVE the jumper wire. REPAIR the circuit. TEST the system for normal operation.
  6. H6 CHECK CIRCUIT 729 (RD/WH) FOR AN OPEN (BATTERY SAVER RELAY) 
      Fig 3: Checking Circuit 729 (RD/WH) For An Open (Battery Saver Relay)
      GF0012935Courtesy of FORD MOTOR CO.
    • Measure the voltage between the battery saver relay pin 2, circuit 729 (RD/WH), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  H7.
    2. NO  : VERIFY the central junction box (CJB) fuse 22 (15A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
  7. H7 CHECK CIRCUIT 1420 (YE/LB) FOR AN OPEN 
      Fig 4: Checking Circuit 1420 (YE/LB) For An Open
      GF0012933Courtesy of FORD MOTOR CO.
    • Measure the voltage between the battery saver relay pin 3, circuit 1420 (YE/LB), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  H8.
    2. NO  : VERIFY the CJB fuse 4 (15A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
  8. H8 CHECK CIRCUIT 1005 (VT/OG) FOR AN OPEN (BATTERY SAVER RELAY) 
    • Connect: Battery Saver Relay
      • Fig 5: Checking Circuit 1005 (VT/OG) For An Open (Battery Saver Relay)
      GF0012931Courtesy of FORD MOTOR CO.
    • Measure the voltage between the IC C220a-1, circuit 1005 (VT/OG), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  H9.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  9. H9 CHECK FOR CORRECT IC OPERATION 
    • Key in OFF position.
    • Disconnect all the IC connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the 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 IC. REFER to INSTRUMENT CLUSTER (IC) AND WARNING CHIMES article. 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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