Ford 2003 Mustang Workshop Manual page 3505

C4 CHECK INTERIOR LAMP SWITCH INPUT TO THE GEM —
MONITOR GEM PID DOMESW
Monitor the GEM PID DOMESW, while moving the interior
lamp switch from the OFF to the ON position.
Does the GEM PID DOMESW values agree with the
interior lamp switch positions?
C5 CHECK THE LUGGAGE COMPARTMENT LID AJAR INPUT
TO THE GEM — MONITOR THE GEM PID DECKLID
Monitor the GEM PID DECKLID, while opening, and closing,
the luggage compartment lid.
Does the GEM PID DECKLID agree with the luggage
compartment lid position?
C6 CHECK CIRCUIT 705 (LG/OG) FOR OPEN
Turn on both map lamps using the switches in the rear view
mirror.
Turn on both vanity mirror lamps.
Open the luggage compartment lid.
Disconnect: GEM C201c.
Connect a fused jumper (20A) between GEM C201c Pin 4,
Circuit 705 (LG/OG), harness side and battery positive
terminal.
Do the demand lamps illuminate?
C7 CHECK CIRCUIT 1006 (DG/WH) FOR OPEN
NOTE: Verify battery voltage at CJB Fuse 7 (20A) before
carrying out this test.
Disconnect: GEM C201a.
Measure the voltage between GEM C201a Pin 1, Circuit 1006
(DG/WH), harness side and ground.
Is the voltage greater than 10 volts?
C8 CHECK CIRCUIT 705 (LG/OG) FOR VOLTAGE AT
INOPERATIVE DEMAND LAMP
Key in OFF position.
Disconnect inoperative demand lamp, dome/map C929
Yes
GO to C5 .
No
GO to Pinpoint Test B .
Yes
GO to C6 .
No
GO to Pinpoint Test B .
Yes
GO to C7 .
No
REPAIR the circuit.
REPEAT the self-test.
CLEAR the DTCs.
Yes
INSTALL a new GEM. For
additional information,
REFER to Section 419-
10 . REPEAT the self-test.
CLEAR the DTCs.
No
REPAIR the circuit.
REPEAT the self-test.
CLEAR the DTCs.
Yes
GO to C9 .