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Pinpoint Test

  1. CHECK THE BCM HORN OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
    1. Ignition OFF.
    2. Disconnect: BCM C2280E.
    3. Ignition ON.

    Does the horn continue to sound? 

    1. Yes: REPAIR the circuit.
    2. No: GO to 2  .
  2. ISOLATE THE BCM
    1. Ignition OFF.
    2. Connect: BCM C2280E.
    3. Disconnect: BCM C2280B.

    Does the horn continue to sound? 

    1. Yes: GO to  6.
    2. No: GO to 3  .
  3. CHECK THE HORN SWITCH INPUT TO THE BCM CIRCUIT FOR A SHORT TO GROUND
    1. Disconnect: SCCM C2414A.
    2. Connect: BCM C2280B.

    Does the horn continue to sound? 

    1. Yes: REPAIR the circuit.
    2. No: GO to 4  .
  4. ISOLATE THE STEERING WHEEL AND HARNESS
    1. Connect: SCCM C2414A.
    2. Remove the driver air bag module. REFER to DRIVER AIR BAG MODULE .
    3. Disconnect: Clockspring C218B.
    4. Connect: Battery Ground Cable.

    Does the horn continue to sound? 

    1. Yes: GO to 5  .
    2. No: REPAIR the steering wheel harness for a short to ground or INSTALL a new steering wheel. REFER to STEERING WHEEL .
  5. CHECK THE CLOCKSPRING FOR A SHORT TO GROUND
    1. Remove the clockspring. REFER to CLOCKSPRING .

    Does the horn continue to sound? 

    1. Yes: GO to  7.
    2. No: INSTALL a new clockspring. REFER to CLOCKSPRING .
  6. CHECK FOR CORRECT BCM OPERATION
    1. Disconnect and inspect all BCM connectors.
    2. Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    3. Reconnect the BCM connectors. Make sure they seat and latch correctly.
    4. Operate the system and determine if the concern is still present.

    Is the concern still present? 

    1. Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs  address this concern, INSTALL a new BCM. REFER to BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA) or BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA) .
    2. No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
  7. CHECK FOR CORRECT SCCM OPERATION
    1. Disconnect and inspect all SCCM connectors.
    2. Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    3. Reconnect the SCCM connectors. Make sure they seat and latch correctly.
    4. Operate the system and determine if the concern is still present.

    Is the concern still present? 

    1. Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs  address this concern, INSTALL a new SCCM REFER to STEERING COLUMN CONTROL MODULE (SCCM) .
    2. No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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