2008 ford expedition electrical

Asked by Feb 15, 2019 at 05:01 PM about the 2008 Ford F-150

Question type: Maintenance & Repair

I parked my car went out later and it would not start. Thought maybe battery
even though it's only 8 months old. Charged it and indicator on charger says
it is charged. the only thing that lights up is the anti theft light flashes every 2
seconds. tune on the key and it stops. nothing else works nothing on the
dash, no air no radio nothing no door locks no wipers not interior lights no
starter click everything is dead silent.
I even switched the PCM fuse with an identical one but still nothing. I pulled
all the engine compartment fuses and none are blown can't tell on the 6 or
so like the PCM fuse. What could be wrong, and what can I do to
troubleshoot?

2 Answers

71,245

Sounds like you triggered the anti-theft system. While this is active/flashing, it will not start. There is a procedure for getting out of this in your owners manual, available on line, just google your truck.

8,490

On the lead in to your post, saw f150 and expedition, which one is it? Make sure battery has a full charge and all battery connections good, on all ends not just at the battery. Voltage and grounds are important. Use a test light at fuses in fuse box to check for voltage, some fuses hot all the time, some go hot with the key on. Check them both ways. Voltage to fuse box should come from positive side of battery. I repeat grounds are important, also. I looked at security system for both the f150 and expedition, that is a starter motor disable among other components. With testing you can usually see if starter motor will crank the engine, but, that doesn't mean it will start. Any starter motor testing, make sure tranny is in park or neutral and parking brake is set.

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