Ford Mustang 1999 - Pinpoint Test M: The Charge System Warning Indicator is Never;Always On

PINPOINT TEST M: THE CHARGE SYSTEM WARNING INDICATOR IS NEVER/ALWAYS ON
 Is BRAKE warning indicator always on?
Yes
GO to L12.
No
INSTALL a new GEM. REFER toSection 419-10. CLEAR the DTCs. REPEAT the self-test.
L12 CHECK CIRCUIT 128 (VT/YE) FOR SHORT TO GROUND BETWEEN GEM AND INSTRUMENT CLUSTER
Instrument Cluster C251
Measure the resistance between GEM C352 Pin 13, Circuit 128 (VT/YE), harness side and ground.
 Is 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.
CONDITIONS DETAILS/RESULTS/ACTIONS
M1 CHECK CHARGING SYSTEM
Check charging system operation. Refer to Section 414-00.
 Is the charging system operating correctly?
Yes
GO to M2.
No
REFER to Section 414-00.
M2 CHECK CHARGE SYSTEM WARNING INDICATOR WITH ENGINE OFF
Observe the charge system warning indicator.
 Is the charge system warning indicator on?
Yes
GO to M5.
No
GO to M3.
M3 CHECK THE INSTRUMENT CLUSTER INPUT
Page
25
of
32
1999 Mustang Workshop Manual
1/
18/
2013
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSXB/~MUS~LEN/20/
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