Pinpoint Test B: The Power Seat Is Inoperative - Vehicles With Sir

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

B1 CHECK THE VOLTAGE TO THE SEAT SWITCH
- Key in OFF position.
- Disconnect: Driver Seat Control Switch C369 or Passenger Seat Control Switch C330.
- Measure the voltage between driver seat control switch C369-7, circuit 566 (DG) or passenger seat control switch C330-7, circuit 51 (BK/WH), harness side and ground.
  
  Fig 1: Checking Voltage To Seat Switch
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : Go to B2.

No : VERIFY central junction box (CJB) fuse 112 (30A) (driver) or 114 (30A) (passenger) is OK. If OK, REPAIR circuit 566 (DG) (driver) or circuit 51 (BK/WH) (passenger). TEST the system for normal operation.
B2 CHECK 57 (BK) CIRCUIT FOR OPEN
- Measure the resistance between driver seat control switch C369-1, circuit 57 (BK) or passenger seat control switch 3330-1, circuit 57 (BK), harness side and ground.
  
  Fig 2: Checking 57 (BK) Circuit For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new seat control switch. REFER to SEAT CONTROL SWITCH - WITH SEAT INTEGRATED RESTRAINTS (SIR) . TEST the system for normal operation.

No : REPAIR circuit 57 (BK). TEST the system for normal operation.