Did the safety belt indicator illuminate for approximately 3 seconds and turn off?
Yes
INSTALL a new GEM. REFER to
Section 419-10
. CLEAR the DTCs. REPEAT the self test.
No
GO to
I4
.
I4
DETERMINE IF SAFETY BELT INDICATOR CIRCUIT IS SHORTED TO GROUND
Buckle the driver safety belt.
Is the safety belt indicator always on?
Yes
GO to
I5
.
No
GO to
I7
.
I5
CHECK IF THE GEM IS INTERNALLY GROUNDED
GEM C352
Is the safety belt indicator always on?
Yes
GO to
I6
.
No
INSTALL a new GEM. REFER to
Section 419-10
. CLEAR the DTCs. REPEAT the self-test.
I6
CHECK CIRCUIT 450 (DG/LG) FOR A SHORT TO GROUND BETWEEN THE GEM AND THE INSTRUMENT CLUSTER
Instrument Cluster C250
Measure the resistance between the GEM C352 Pin 26, Circuit 450 (DG/LG), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes
INSTALL a new instrument cluster. REFER to
Instrument Cluster
. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
I7
CHECK CIRCUIT 450 (DG/LG) FOR A SHORT TO BATTERY BETWEEN THE GEM AND THE INSTRUMENT CLUSTER
Page 17 of 32
1999 Mustang Workshop Manual
1/18/2013
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSXB/~MUS~LEN/20/...
