2003 FORD MUSTANG Workshop Manual

Page 3297 of 4378

FORD MUSTANG 2003  Workshop Manual PINPOINT TEST S: THE SERVICE ENGINE SOON INDICATOR IS 
NEVER/ALWAYS ON  side and ground. 
�z Key in ON position. 
�z Does the ABS indicator illuminate?  No 
GO to 
R3  . 
R3 CHECK CIRCUIT 603 (DG) FOR

Page 3298 of 4378

FORD MUSTANG 2003  Workshop Manual PINPOINT TEST T: THE TURN/HAZARD INDICATOR IS 
NEVER/ALWAYS ON  CLUSTER SERVICE ENGINE SOON 
INDICATOR ACTIVE COMMAND 
�z
Connect the diagnostic tool. 
�z Key in ON position. 
�z Enter the following d

Page 3299 of 4378

FORD MUSTANG 2003  Workshop Manual PINPOINT TEST U: THE TRACTION CONTROL INDICATOR IS 
NEVER/ALWAYS ON  �z
Does the voltage alternate between 0 volts and 10 volts with 
the turn signal on?  T3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERA

Page 3300 of 4378

FORD MUSTANG 2003  Workshop Manual PINPOINT TEST V: THE INSTRUMENT CLUSTER IS INOPERATIVE  GO to 
U2  . 
U2 DETERMINE IF INSTRUMENT 
CLUSTER IS AT FAULT  �z
Connect the diagnostic tool. 
�z Key in ON position. 
�z Enter the following d

Page 3301 of 4378

FORD MUSTANG 2003  Workshop Manual �z
Is the voltage greater than 10 volts?  No 
REPAIR the circuit. TEST 
the system for normal 
operation. 
V3 CHECK RUN/START POWER SUPPLY TO THE 
INSTRUMENT CLUSTER  �z
Key in OFF position. 
�z Disco

Page 3302 of 4378

FORD MUSTANG 2003  Workshop Manual PINPOINT TEST W: NO COMMUNICATION WITH THE GENERIC 
ELECTRONIC MODULE (GEM)  �z
Is the resistance less than 5 ohms?  V6 CHECK FOR CORRECT INSTRUMENT CLUSTER 
OPERATION  �z
Disconnect all instrument cl

Page 3303 of 4378

FORD MUSTANG 2003  Workshop Manual OPEN 
�z
Key in OFF position. 
�z Measure the resistance between the GEM C201b pin 4, 
circuit 397 (BK/WH), harness side and ground. 
�z Is the resistance less than 5 ohms?  Yes 
GO to 
W3  . 
No 
REP

Page 3304 of 4378

FORD MUSTANG 2003  Workshop Manual REMOVAL AND INSTALLATION 
Instrument Cluster 
Removal and Installation 
All vehicles 
1.  CAUTION: Electronic modules are sensitive to electrical charges. If exposed to 
these charges, damage may resu