Pinpoint Test A: All Power Windows Are Inoperative

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK THE VOLTAGE TO THE LH FRONT WINDOW CONTROL SWITCH - CIRCUIT 170 (RD/LB)
- Key in OFF position.
- Disconnect: LH Front Window Control Switch C508.
- Key in ON position.
- Measure the voltage between LH front window control switch C508-8, circuit 170 (RD/LB), harness side and ground.
  
  Fig 1: Checking Voltage To LH Front Window Control Switch - Circuit 170 (RD/LB)
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to A2.

No : INSPECT smart junction box (SJB) fuse 15 (30A). If OK, GO to A3.
A2 CHECK THE GROUND TO THE LH FRONT WINDOW CONTROL SWITCH - CIRCUIT 57 (BK)
- Key in OFF position.
- Measure the resistance between LH front window control switch C508-12, circuit 57 (BK), harness side and ground.
  
  Fig 2: Checking Ground To LH Front Window Control Switch - Circuit 57 (BK)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new LH front window control switch. REFER to WINDOW CONTROL SWITCH in this article. TEST the system for normal operation.

No : REPAIR the circuit. TEST the system for normal operation.
A3 CHECK CIRCUIT 170 (RD/LB) FOR AN OPEN
- Key in OFF position.
- Disconnect: SJB C2280c.
- Measure the resistance between LH front window control switch C508-8, circuit 170 (RD/LB), harness side and SJB C2280c-29, circuit 170 (RD/LB), harness side.
  
  Fig 3: Checking Circuit 170 (RD/LB) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to PINPOINT TEST I .

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