Pinpoint Test A: The Power Seat Is Inoperative - Vehicles Without 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.

A1 CHECK THE VOLTAGE TO THE SEAT SWITCH
- Key in OFF position.
- Disconnect: Driver Seat Control Switch C360 or Passenger Seat Control Switch C330.
- Measure the voltage between driver seat control switch C360-4, circuit 566 (DG) or passenger seat control switch C330-2, 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 A2.

No : VERIFY central junction box (CJB) fuse 112 (30A) (driver) or 114 (30A) (passenger) is OK. If OK, REPAIR driver circuit 566 (DG) or passenger circuit 51 (BK/WH). TEST the system for normal operation.
A2 CHECK CIRCUIT 57 (BK) FOR OPEN
- Measure the resistance between driver seat control switch C360-8, circuit 57 (BK) or passenger seat control switch 3330-4, circuit 57 (BK), harness side and ground.
  
  Fig 2: Checking Circuit 57 (BK) 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 . TEST the system for normal operation.

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