2003 FORD MUSTANG Workshop Manual

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Page 3737 of 4378

FORD MUSTANG 2003 Workshop Manual G2 CHECK CIRCUIT 316 (YE/LB) OR 319 (YE/BK) FOR AN OPEN
�z
Disconnect: Driver Window Regulator Control Switch C537.
�z Measure the resistance between left rear window regulator motor
C3118, circuit

G2 CHECK CIRCUIT 316 (YE/LB) OR 319 (YE/BK) FOR AN OPEN
z
Disconnect: Driver Window Regulator Control Switch C537.
z Measure the resistance between left rear window regulator motor
C3118, circuit 316 (YE/LB), harness side and driver window
regulator control switch C537 pin 12, circuit 316 (YE/LB), harness
side; or between right rear window regulator motor C3119, circuit
319 (YE/BK), harness side and driver window regulator control
switch C537 pin 13, circuit 319 (YE/BK), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new
driver window
regulator control
switch. REFER to
Switch
— Window
Regulator Control in
this section. TEST
the system for
normal operation.
No
REPAIR the circuit.
TEST the system
for normal
operation. G3 CHECK CIRCUIT 317 (GY/OG) OR 320 (RD/BK) FOR GROUND
z
Measure the resistance between left rear window regulator motor
C3118, circuit 317 (GY/OG), harness side and ground; or between
right rear window regulator motor C3119, circuit 320 (RD/BK),
harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
G5 .
No
GO to G4 .
G4 CHECK CIRCUIT 317 (GY/OG) OR 320 (RD/BK) FOR AN OPEN
z
Disconnect: Driver Window Regulator Control Switch C537.
z Measure the resistance between left rear window regulator motor
C3118, circuit 317 (GY/OG), harness side and driver window
regulator control switch C537 pin 10, circuit 317 (GY/OG), harness
side; or between right rear window regulator motor C3119, circuit
320 (RD/BK), harness side and driver window regulator control
switch C537 pin 11, circuit 320 (RD/BK), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new
driver window
regulator control
switch. REFER to
Switch
— Window
Regulator Control in
this section. TEST
the system for
normal operation.
No
REPAIR the circuit.
TEST the system
for normal
operation. Klj . 24 ba
322003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

Page 3738 of 4378

FORD MUSTANG 2003 Workshop Manual PINPOINT TEST H: THE DEFROST SYSTEM IS INOPERATIVE G5 CHECK DRIVER WINDOW REGULATOR CONTROL SWITCH
�z
Disconnect: Driver Window Regulator Control Switch C537.
�z Carry out the driver window regulat

Page 3739 of 4378

FORD MUSTANG 2003 Workshop Manual No
GO to
H6 .
H4 CHECK CIRCUIT 175 (BK/YE)
�z
Disconnect: ICM C220a.
�z Key in ON position.
�z Measure the voltage between ICM C220a pin 9, circuit 175
(BK/YE), harness side and ground.
�z Is

Page 3740 of 4378

FORD MUSTANG 2003 Workshop Manual �z
Disconnect: Heated Rear Window Grid Ground Connector
C402b.
�z Measure the resistance between heated rear window grid
C402b, circuit 1205 (BK), harness side and ground.
�z Is the resistance les

Page 3741 of 4378

FORD MUSTANG 2003 Workshop Manual �z
Is the rear window defrost switch indicator ON? (BR/LB). TEST the system
for normal operation.
H11 CHECK ICM OUTPUT
�z
Trigger the ICM active command R DEFRLY to ON.
�z Measure the resistance

Page 3742 of 4378

FORD MUSTANG 2003 Workshop Manual �z
Is the voltage greater than 10 volts? H14 CHECK INPUT TO THE ICM
�z
Connect: Rear Window Defrost Switch C241.
�z Depress the rear window defrost switch to ON.
�z Measure the voltage between ICM

Page 3743 of 4378

FORD MUSTANG 2003 Workshop Manual PINPOINT TEST I: THE DEFROST SYSTEM WILL NOT SHUT OFF
AUTOMATICALLY caused by a loose or
corroded connector.
CLEAR the DTCs.
REPEAT the self-
test. Test Step Result / Action to Take
I1 CHECK C

Page 3744 of 4378

FORD MUSTANG 2003 Workshop Manual Component Tests
Grid Wire Test
1. Using a bright lamp inside the vehicle, inspect the wire grid from the exterior. A broken grid wire will appear as a brown spot.
2. Run the engine at idle. Set th

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