Off - Ford 2003 Mustang Workshop Manual

E4 CHECK THE GEM OUTPUT TO THE HORN
Connect the diagnostic tool.
Trigger the GEM active command HORN ON and OFF.
Did the horn sound and turn off?
E5 CHECK THE GEM OUTPUT TO THE PARKING LAMPS
Connect the diagnostic tool.
Trigger the GEM active command PARKLAMPS ON and

OFF.

Did the parking lamps illuminate and turn off?
E6 CHECK CIRCUIT 6 (YE/LG) FOR SHORT TO POWER
Disconnect: Horn Relay.
Disconnect: GEM C201c.
Measure the voltage between GEM C201c Pin 12, Circuit 6
(YE/LG), harness side and ground.
Is the voltage greater than 10 volts?
E7 CHECK CIRCUIT 6 (YE/LG) FOR SHORT TO GROUND
Measure the resistance between GEM C201c Pin 12, Circuit
6 (YE/LG), harness side and ground.
Is the resistance greater than 10,000 ohms?
E8 CHECK CIRCUIT 6 (YE/LG) FOR OPEN
Measure the resistance between GEM C201c Pin 12, Circuit
6 (YE/LG), harness side and horn relay Pin 1, Circuit 6
(YE/LG), harness side.
normal operation.
Yes
GO to E5 .
No
GO to E6 .
Yes
INSTALL a new GEM. For
additional information,
REFER to Section 419-
10 . REPEAT the self-test.
CLEAR the DTCs.
No
GO to E10 .
Yes
GO to E7 .
No
REPAIR Circuit 6 (YE/LG).
REPEAT the self-test.
CLEAR the DTCs.
Yes
GO to E8 .
No
REPAIR Circuit 6 (YE/LG).
REPEAT the self-test.
CLEAR the DTCs.
Yes
GO to E9 .
No
REPAIR Circuit 6 (YE/LG).
REPEAT the self-test.
CLEAR the DTCs.