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303-06-6 303-06-6Starting 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
A4 CHECK CIRCUIT 32 (RD/LB) FOR VOLTAGE AT THE DIGITAL
TR SENSOR (AUTOMATIC TRANSMISSION ONLY) (Continued)
• Measure the voltage between digital TR sensor C167-10, circuit
32 (RD/LB) and ground while holding the key in the START
position.
Yes
GO to A5.
No
• Is the voltage greater than 10 volts? GO to A8.
A5 CHECK CIRCUIT 33 (WH/PK) FOR AN OPEN
• Key in OFF position.
• Measure the resistance between digital TR sensor C167-12,
circuit 33 (WH/PK) and starter motor relay C1017-85, circuit 33
(WH/PK).
Yes
GO to A6.
No
REPAIR circuit 33 (WH/PK). TEST the
• Is the resistance less than 5 ohms? system for normal operation.
(Continued)
2005 Mustang, 12/2004