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303-06-8 303-06-8Starting System
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE RELAY DOES NOT CLICK (Continued)
Test Step Result / Action to Take
A9 CHECK CIRCUIT 1050 (LG/PK) FOR VOLTAGE (Continued)
• Measure the voltage between ignition switch C250-4, circuit
1050 (LG/PK) and ground.
Yes
GO to A10.
No
REPAIR circuit 1050 (LG/PK). TEST the
• Is the voltage greater than 10 volts? system for normal operation.
A10 CHECK CIRCUIT 1522 (DG) FOR AN OPEN
• Measure the resistance between ignition switch C250-7, circuit
Yes
1522 (DG) and SJB fuse 21. INSTALL a new ignition switch. REFER to
• Is the resistance less than 5 ohms? Section 211-05. TEST the system for
normal operation.
No
REPAIR circuit 1522 (DG). TEST the
system for normal operation.
A11 CHECK CIRCUIT 32 (RD/LB) FOR AN OPEN
• Key in OFF position.
(Continued)
2005 Mustang, 12/2004