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1998 F 250 5.4 # 7 COIL PACK, HAS POWER ON PRIMARY SIDE BUT

1998 F 250 5.4 #...
1998 F 250 5.4 # 7 COIL PACK, HAS POWER ON PRIMARY SIDE BUT NO IMPULSE ON SECONDARY. CRANK SENSOR OR COMPUTER?
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Answered in 7 minutes by:
11/19/2017
Kenny Z.
Kenny Z., Ford Senior Master Tech
Category: Ford
Satisfied Customers: 5,597
Experience: Auto Trans, Drivability and Electrical Specialist
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Hello, my name is***** and thanks for your question.

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If it has ground signal to the other coils then it wont be a crank sensor. Either signal wire between coil and PCM or PCM. I would first ohm the wire for continuity, short to ground and short to power. If wire checks good then PCM is issue. Or you can backprobe right at the PCM connector to check for pulse. If no pulse at PCM then the PCM is bad, if pulse at PCM then wire is bad. AT PCM connector the circuit is pin 78 white/pink wire.

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Kenny Z.
Kenny Z., Ford Senior Master Tech
Category: Ford
Satisfied Customers: 5,597
Experience: Auto Trans, Drivability and Electrical Specialist
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Customer reply replied 23 days ago
could you send me a pinout for location?
Customer reply replied 23 days ago
my wiring is very discolored could you send a location on connector for pin 78? thanks, Mark

Sure here you go....

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Kenny Z.
Kenny Z.
Kenny Z., Ford Senior Master Tech
Category: Ford
Satisfied Customers: 5,597
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Experience: Auto Trans, Drivability and Electrical Specialist

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