Ford 2003 Mustang Workshop Manual page 3882

Disconnect: Wiper Motor C125.
Disconnect: GEM C201d.
Measure the resistance between wiper motor C125 Pin 1,
Circuit 28 (BK/PK), harness side and GEM C201d Pin 1,
Circuit 58 (WH), harness side.
Is the resistance less than 5 ohms?
PINPOINT TEST C: WINDSHIELD WASHERS DO NOT OPERATE /
OPERATE CORRECTLY
C1 DETERMINE IF GEM IS RECEIVING CORRECT IGNITION
SWITCH STATUS
Key in OFF position.
Connect the diagnostic tool.
NOTE: If the vehicle is equipped with a manual transmission,
depress the clutch while turning the ignition switch to START.
Monitor the GEM PIDs IGN_S, IGN_R IGN_A, and IGN_KEY
while turning the ignition switch through the START, RUN, OFF
and ACC positions.
Do the GEM PID values agree with the ignition switch
positions?
C2 DETERMINE IF GEM IS RECEIVING CORRECT WIPER SWITCH
STATUS FROM MULTIFUNCTION SWITCH
Key in ON position.
Monitor GEM PID WPMODE while activating all wiper control
positions on the multifunction switch.
Does the GEM PID values agree with switch positions?
C3 CHECK GEM CONTROL OF THE WASHER ON/OFF RELAY
Trigger GEM active command WASH RLY ON and OFF.
Do washers turn ON and OFF?
C4 CHECK CIRCUIT 65 (DG) FOR OPEN CIRCUIT BETWEEN CJB
AND WASHER ON/OFF RELAY
NOTE: Verify voltage at CJB F26 (30A) before carrying out this
Test Step
Yes
INSTALL a new wiper motor;
REFER to Motor—Windshield
Wiper . REPEAT the self-test.
CLEAR the DTCs.
No
REPAIR Circuit 28 (BK/PK).
REPEAT the self-test.
CLEAR the DTCs.
Result / Action to
Take
Yes
GO to C2 .
No
REFER to Section
413-09 .
Yes
GO to C3 .
No
GO to Pinpoint Test
B .
Yes
INSTALL a new GEM;
REFER to Section
419-10 . REPEAT the
self-test. CLEAR the
DTCs.
No
GO to C4 .
Yes