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Pinpoint Test A: The Power Seat Is Inoperative - Driver, Without Memory

NOTE: If a seat equipped with a seat mounted side air bag is being serviced, the Supplemental Restraint System (SRS) must be depowered. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS fault.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
  1. A1 CHECK FOR VOLTAGE TO THE SEAT CONTROL SWITCH 
    • Ignition OFF.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Driver Seat Side Air Bag C327.
    • Disconnect: Driver Seat Control Switch C360.
      • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
    • Connect the battery ground cable. Refer to BATTERY, MOUNTING AND CABLES .
    • Measure the voltage between driver seat control switch C360-5, circuit SBB32 (VT/RD), harness side and ground.
      Fig 1: Checking Voltage To Seat Control Switch
      G06134172Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
      • Yes:  GO to A2.
      • No:  VERIFY Battery Junction Box (BJB) fuse 32 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams information to identify the possible causes of the circuit short. TEST the system for normal operation.

        DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  2. A2 CHECK FOR GROUND TO THE SEAT CONTROL SWITCH 
    • Measure the resistance between driver seat control switch C360-3, circuit GD126 (BK/WH), harness side and ground.
      Fig 2: Measuring Resistance Between Driver Seat Control Switch C360-3, Circuit GD126 (BK/WH), Harness Side And Ground
      G06063176Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      • Yes:  INSTALL a new driver seat control switch. REFER to Seat Control Switch  . TEST the system for normal operation.

        DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

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

        DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

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