2010 f150 intermittent no crank/start issue

50

Asked by GuruBF6BG Jan 21, 2019 at 03:46 PM about the 2010 Ford F-150 XLT SuperCrew 4WD

Question type: Maintenance & Repair

my 2010 f150 has an intermittent issue where it will not crank. usually occurs
after it sits for a day. can be started by crossing at solenoid on starter. replaced
starter, replaced ignition switch, have swapped relays but still same issue.
engine is 5.4  and its 4wd. any ideas?

2 Answers

27,570

Note the diagram, is this what you have? You can see starter relay, two sides to the relay, the switch side and the control side. The switch side in the diagram is that line with arrowhead. The top terminal on that side is voltage, hot all the time and fuse protected. Unplug the relay, use jumper wire on switch side of relay, those two terminal sockets. The starter motor should crank the engine. Make sure tranny is in park or neutral and parking brake is set, if you try that. The control side in diagram, right side of relay, needs voltage and ground, the top wire on that side is voltage and the bottom wire is ground. Grounded by pcm. I did look at your security system, it will disable starter motor, so I wonder about security system? Any applicable trouble codes?

4 people found this helpful.
50

yes have trouble code P1707 , transmission range censor circuit low.

5 people found this helpful.

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