2015 - 2019 F-150

2015 F150 Electronics Dead

Old 03-12-2019, 09:29 PM
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2015 F150 Electronics Dead

2015, F-150, 61K miles, 3.5L ECO-boost,

All electronics die after attempting to use unlock button on fob. On a second occasion, electronics died after turning key in the ignition to the ON position. When this happens, it appears nothing works (power locks, horn, automatic start, lock/unlock from fob, alarm system, no dashboard lights, truck does not turn on, ect).

I tried to jump the battery but this did not help at all. It was only after disconnecting and reconnecting the battery that I was able to get the truck to turn on. Could this be a computer issue? Is there a part that could possibly be related to this issue that I could replace or update?
Old 03-13-2019, 12:41 PM
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Try cleaning your battery terminals first.
Old 03-13-2019, 03:45 PM
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Also get your battery load tested.
Old 03-13-2019, 07:23 PM
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Next time it happens, take one jumper cable and put it on the negative side of the battery. Connect it first to the engine. Make sure you have a clean ground. If that solves the issue, you have a bad ground to the engine. If it didn't fix it, take the battery jumper cable from the negative post to the frame. If it solves the issue you have a bad ground at the frame. If that doesn't fix it, run the jumper cable from the engine to the frame. All of your issues sounds like a ground problem to me.
Old 03-14-2019, 11:05 PM
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both of those functions go in/out of the CJB (interior smart fuse box) Its possible that you have an issue there.

do you have/had any water leaks in the cab? Windshield replaced? Sunroof drain tubes clogged?

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