Ford Explorer 2003 - 14 CHECK CIRCUIT 991 (TN;LB) FOR OPEN; Pinpoint Test J: Passenger Front Window Inoperative; J1 CHECK THE VOLTAGE TO THE PASSENGER FRONT WINDOW CONTROL SWITCH

Pinpoint Test J: Single Power Window Is Inoperative — Passenger Front Window
Normal Operation
Under normal operation the passenger front window control switch receives power from the driver window control switch through circuit 170 (RD/LB). The passenger front window control
switch provides power to the power window motor through circuit 334 (RD/YE) and ground through 333 (YE/RD) to operate the passenger front window down, and power through circuit 333
(YE/RD) and ground through 334 (RD/YE) to operate the passenger front window up.
When operating the passenger front window using the driver window control switch, power is sent to the passenger front window control switch through circuit 314 (TN/LB) and ground
through 313 (WH/YE) to operate the passenger front window down, and power through circuit 313 (WH/YE) and ground through 314 (TN/LB) to operate the passenger front window up.
Possible Causes
 Open in circuits 170 (RD/LB), 313 (WH/YE), 314 (TN/LB), 333 (YE/RD) or 334 (RD/YE).
 Inoperative driver window control switch.
 Inoperative passenger front window control switch.
 Inoperative passenger front window motor.
PINPOINT TEST J: SINGLE POWER WINDOW IS INOPERATIVE — PASSENGER FRONT WINDOW
 Does the driver power window go up?
I4 CHECK CIRCUIT 991 (TN/LB) FOR OPEN
 Disconnect: Driver Power Window Motor C524.
 Measure the resistance between driver power window motor C524-2, circuit 991 (TN/LB), and driver window
control switch C504a-7, circuit 991 (TN/LB) harness side.
 Is the resistance less than 5 ohms?
Yes
GO to I4.
No
REPAIR the circuit. TEST the system for normal
operation.
I5 CHECK CIRCUIT 992 (WH/BK) FOR OPEN
 Measure the resistance between driver power window motor C524-1, circuit 992 (WH/BK), and driver window
control switch C504a-8, circuit 992 (WH/BK) harness side.
 Is the resistance less than 5 ohms?
Yes
INSTALL a new driver power window motor. REFER to
Window Glass — Front Door in this section. TEST the
system for normal operation.
No
REPAIR the circuit. TEST the system for normal
operation.
Test Step Result / Action to Take
J1 CHECK THE VOLTAGE TO THE PASSENGER FRONT WINDOW CONTROL SWITCH —
CIRCUIT 170 (RD/LB)
 Disconnect: Passenger Front Window Control Switch C604.
 Ignition ON.
 NOTE: Set the driver window control switch to the UNLOCK position.
 Measure the voltage between the passenger front window control switch C604-3, circuit 170
(RD/LB) harness side and ground.
Yes
GO to J2.
No
REPAIR the circuit. TEST system for normal operation.
17
2003 Explorer/Mountaineer Workshop Manual
1/17/2011
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3N/~MUS~LEN/19/S
...