Ford 2003 Mustang Workshop Manual page 3506

(coupe), map C907 (convertible), right hand vanity C906, left
hand vanity C978, or luggage compartment C4111.
Measure the voltage between inoperative demand lamp,
Circuit 705 (LG/OG), harness side and ground.
Is the voltage greater than 10 volts?
C9 CHECK CIRCUIT 1205 (BK) FOR OPEN AT INOPERATIVE
DEMAND LAMP
Measure the resistance between inoperative demand lamp
Circuit 1205 (BK), harness side and ground.
Is the resistance less than 5 ohms?
PINPOINT TEST D: THE ILLUMINATED ENTRY IS INOPERATIVE
WHEN USING THE REMOTE TRANSMITTER
Test Step
D1 CHECK THE REMOTE TRANSMITTER
INPUT TO THE GEM
Remove the ignition key from the ignition.
Depress the lock and then the unlock
buttons on the remote transmitter.
Do the doors lock when the lock button
is depressed and unlock when the
unlock button is depressed?
D2 CHECK OPERATION OF ILLUMINATED
ENTRY WITHOUT REMOTE TRANSMITTER
Open the driver door.
Do the courtesy lamps illuminate?
No
REPAIR the circuit in
question. REPEAT the
self-test. CLEAR the
DTCs.
Yes
INSTALL a new demand
lamp assembly. REPEAT
the self-test. CLEAR the
DTCs.
No
REPAIR the circuit in
question. REPEAT the
self-test. CLEAR the
DTCs.
Result / Action to Take
Yes
GO to D2 .
No
REFER to Section 501-14B
Yes
INSTALL a new GEM. For additional
information, REFER to
REPEAT the self-test. CLEAR the DTCs.
No
GO to Pinpoint Test B
.
Section 419-10 .
.