Ford 2003 Mustang Workshop Manual page 3335

Is the resistance less than 5 ohms?
E8 TEST CIRCUIT 14 (BN) FOR SHORT TO BATTERY
Key in OFF position.
Disconnect: GEM C201c.
Set the headlamp switch in the OFF position. Measure the
voltage between GEM C201c pin 7, circuit 14 (BN),
harness side and ground.
Is the voltage greater than 10 volts?
E9 CHECK FOR CORRECT MODULE OPERATION
Check:
for corrosion
for pushed-out pins
connector seated correctly
Connect any disconnected connectors.
Make sure all other system connectors are fully seated.
Operate the system and verify the concern is still present.
Is the concern still present?
PINPOINT TEST F: THE SAFETY BELT WARNING CHIME DOES NOT
OPERATE CORRECTLY
F1 CHECK IGNITION STATES
NOTE: Verify the belt minder is activated before
diagnosing.
Connect the diagnostic tool.
Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
Test Step
Yes
REPAIR the circuit. REPEAT
the self-test. CLEAR the
DTCs.
No
GO to E9 .
Yes
INSTALL a new GEM.
REFER to Section 419-10
CLEAR the DTCs. REPEAT
the GEM self-test.
No
The system is operating
correctly at this time.
Concern may have been
caused by a loose or
corroded connector. CLEAR
the DTCs. REPEAT the self-
test.
Result / Action to Take
Yes
GO to F2 .
No
Go To Pinpoint Test B
.
.