Ford 2003 Mustang Workshop Manual page 3722

Is the resistance less than 5 ohms?
PINPOINT TEST D: A SINGLE POWER WINDOW IS INOPERATIVE —
DRIVER, CONVERTIBLE
D1 CHECK THE IGNITION SWITCH INPUT TO THE GEM
Select GEM PID IGN_A, IGN_R, IGN_S and IGN_KEY.
Insert the ignition key in the ignition switch and turn to each
position while monitoring PIDs.
Did the PID values agree with the ignition switch
positions?
D2 CHECK THE DRIVER WINDOW REGULATOR CONTROL
SWITCH INPUT TO THE GEM
Key in ON position.
Enter the following diagnostic mode on the diagnostic tool:
GEM PID D_UP_SW and D_DN_SW.
Actuate the driver window regulator control switch to the UP
and DOWN position.
Did the PID values agree with the driver window regulator
control switch positions?
D3 CHECK THE POWER SUPPLY TO THE WINDOW
REGULATOR CONTROL SWITCH
Disconnect: Driver Window Regulator Control Switch C537.
Key in ON position.
Measure the voltage between driver window regulator control
switch C537 pin 15, circuit 400 (LB/BK), harness side and
ground.
Is the voltage greater than 10 volts?
D4 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
Measure the resistance between driver window regulator
control switch C537 pin 14, circuit 1205 (BK), harness side
and ground.
Test Step Result / Action to Take
Yes
GO to D2 .
No
REFER to Section 211-05
for ignition switch
diagnosis.
Yes
GO to D9 .
No
GO to D3 .
Yes
GO to D4 .
No
GO to D8 .
Yes
GO to D5 .
No
REPAIR the circuit. TEST
the system for normal
operation.