2003 FORD MUSTANG Workshop Manual

Page 3449 of 4378

FORD MUSTANG 2003  Workshop Manual PINPOINT TEST D: ONE LOW BEAM HEADLAMP IS INOPERATIVE  �z
Is the voltage greater than 10 volts?  GO to 
C3  . 
C3 CHECK CIRCUIT 632 (GY/OG) FOR OPEN 
�z
Disconnect: Multifunction Switch C202a. 
�z Mea

Page 3450 of 4378

FORD MUSTANG 2003  Workshop Manual PINPOINT TEST E: ONE HIGH BEAM HEADLAMP IS INOPERATIVE 
PINPOINT TEST F: THE HEADLAMPS ARE ON CONTINUOUSLY 
Test Step  Result / Action to Take 
E1 CHECK THE VOLTAGE TO THE INOPERATIVE HEADLAMP 
BULB

Page 3451 of 4378

FORD MUSTANG 2003  Workshop Manual �z
Is the voltage greater than zero volts?  F4 CHECK CIRCUIT 13 (RD/BK) FOR SHORT TO POWER 
�z
Remove Fuse 4 (7.5A) and Fuse 10 (7.5A) from the 
CJB. 
�z Measure the voltage between multifunction swit

Page 3452 of 4378

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18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

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FORD MUSTANG 2003  Workshop Manual DIAGNOSIS AND TESTING 
Stoplamps 
Refer to Wiring Diagrams Cell 
90  , Turn/Stop/Hazard Lamps for schematic and connector information. 
Inspection and Verification  1. Verify the customer concerns. 
2

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FORD MUSTANG 2003  Workshop Manual Pinpoint Tests 
PINPOINT TEST G: THE STOPLAMPS ARE INOPERATIVE 
PINPOINT TEST H: ONE OR MORE STOPLAMPS ARE INOPERATIVE 
Test Step  Result / Action to Take 
G1 CHECK CIRCUIT 10 (LG/RD) FOR AN OPEN 
�z

Page 3455 of 4378

FORD MUSTANG 2003  Workshop Manual PINPOINT TEST I: THE STOPLAMPS ARE ON CONTINUOUSLY  �z
If the high mounted stoplamp is inoperative, measure the voltage 
between the inoperative high mounted stoplamp C475 (C4199 for 
Cobra) pin 1, ci

Page 3456 of 4378

FORD MUSTANG 2003  Workshop Manual operation. 
I2 CHECK THE SPEED 
CONTROL SYSTEM  �z
Disconnect: Speed Control 
Servo C122. 
�z Do the stoplamps continue 
to illuminate?  Yes 
GO to 
I3  . 
No 
REFER to  Section 310 - 03  . 
I3 CHECK