Ford 2003 Mustang Workshop Manual page 3720

Is the resistance less than 5 ohms?
A3 CHECK CIRCUIT 397 (BK/WH) FOR SHORT TO POWER
Measure the voltage between the GEM C201b pin 4, circuit
397 (BK/WH), harness side and ground.
Is any voltage present?
PINPOINT TEST B: ALL POWER WINDOWS ARE INOPERATIVE —
CONVERTIBLE
B1 CHECK THE POWER SUPPLY TO THE WINDOW
REGULATOR CONTROL SWITCH
Key in OFF position.
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?
B2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
Measure the resistance between driver window regulator Yes
Test Step
REPAIR the circuit(s) in
question. TEST the system
for normal operation.
Yes
REPAIR the circuit. TEST
the system for normal
operation.
No
REFER to Section 418-00
Result / Action to Take
Yes
GO to B2 .
No
REPAIR the circuit. TEST the
system for normal operation.
.