SOS - Car won’t start (SOLVED!)

[TexasRebel]

I thought a 3 y.o. battery was the culprit, but I changed that out and it didn’t help.

Vehicle doesn’t seem to be responding to the key.
Lock & unlock don’t work. If I press the trunk open button repeatedly it will flash the hazards once. Door handles don’t lock or unlock doors. Interior buttons don’t do anything either.

Trunk lid buttons don’t respond. Both under the bumper and on the dashboard.

Start button doesn’t light up when I press the clutch. When I press the start button it asks for the clutch to be pressed even if it is.

Wrench light comes on and says, ”see manual”.
Power steering assist fault comes up.
Engine doesn’t turn over.

Radio powers up and appears to tune to a station, but does not produce sound.

Driver window does the normal dip when the door opens and closes. Passenger side window is stuck in the dip-down position.


I’m looking for any suggestions before I trailer this thing to the dealership. I‘ll try to pull codes if I can get my scanner working.


EDIT FOR SOLUTION:
The BCM came unplugged… somehow.

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[gtcs20148]

Have you replaced your Key Fob batteries? Or at least put the Key Fob in the cup holder tray?

Kinda sounds like it is not seeing your key fob.

 

[JeremyPro5.0]

Did you verify battery in key fob is good?
If key fob bat is good then. ….

You may have to reteach it if it really killed ALL power.

under your door handle cover you should have a normal key I am told. I’ve never popped off cover. Key should be in your fob.

Once in. Under cup holder rubber gaskets you should be able to place your key fob in and car should then start.

 

[Ogopogo]

My guess is the ECU (Engine Control Unit) or the BCM (Body Control Module), or both, is toast.

 

[TexasRebel]

I forgot to mention I also replaced the fob batteries.

The fob in the cup holder does nothing extra.

I haven’t yet tried my other fob.

I just read in the manual:

Steering Assist Fault Service Required
The power steering system has detected a condition within the power steering system or passive entry or passive start system requires service. Contact an authorized dealer.

How much sense does THAT make?

 

[Torched10]

My guess is the ECU (Engine Control Unit) or the BCM (Body Control Module), or both, is toast.

Have you tried starting it with ford pass.did you try remote start on fob.disconnect battery

 

[TexasRebel]

Have you tried starting it with ford pass.did you try remote start on fob.disconnect battery

2016’s & manuals can’t do that.

 

[TexasRebel]

The BMS reset I found somewhere on this site (flashing brights and pressing the brake) indicated it did something. I got the battery LED to flash.

Is it the BCM that searches for the fob in the cup holder? I’m stumped why I can’t even NFC start this thing.

 

[fmc_smt]

Pull up the liners in the cup holder , ther will be a slot to put the key in . This sounds more like alow vehicle battery issue .

 

[VIPR01]

The Battery will cause freaky non-standard issues, also I’ve seen a similar problem where rodents chewed on some random wiring in the engine bay - something to check out….

 

[br_an]

Did you look at the fuses?

See this thread yet? Same error you mentioned

 

[TexasRebel]

Did you look at the fuses?

See this thread yet? Same error you mentioned

I’ve been looking at fuses, haven’t found a blown one yet. I’ll check out that thread.

I’m getting no power to the OBD2 port. Scanner isn’t responding. I’m leaning harder toward something being fried.

 

[br_an]

I’ve been looking at fuses, haven’t found a blown one yet. I’ll check out that thread.

I’m getting no power to the OBD2 port. Scanner isn’t responding. I’m leaning harder toward something being fried.

Have you also checked fuses in the passenger side kick panel?


This guy had issues with ODBII power also, found a blown fuse in ps kick panel
https://www.mustang6g.com/forums/threads/no-power-at-obdii.144876/post-2966464

 

[TexasRebel]

After already having to replace my trunk lid harness, I’m wondering if there isn’t a similar issue in another harness somewhere.

At this point I think winching it onto a trailer and taking it to the dealership is the best looking option.

 

[Cobra Jet]

Check to make sure both your brake pedal and clutch pedal bumper pads are still in place.

See this thread:
https://www.mustang6g.com/forums/threads/brake-pedal-bumper-clutch-pedal-bumper-nhtsa-recall.172153/


And this thread:
https://www.mustang6g.com/forums/threads/brake-light-switch-near-pedal-failure.122100/

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Clutch safety switch failure:
https://www.mustang6g.com/forums/th...s-breaking-off-solutions.165464/#post-3366792

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Not sure if any of these links have been mentioned or if you saw any of them regarding non-starts.


If you’re having difficulties getting it started you may want to review these threads:
https://www.mustang6g.com/forums/th...cident-or-salvage-repair.165362/#post-3364334

https://www.mustang6g.com/forums/th...sors-on-the-core-support.169132/#post-3438164

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There is also this thread where a GT350 owner had a no power non-start issue and could not get the car to start, it ended up being a 125A fuse:
https://www.mustang6g.com/forums/threads/car-is-dead-need-help.137125/

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No power to OBD port:
https://www.mustang6g.com/forums/threads/no-power-at-obdii.144876/

https://www.mustang6g.com/forums/threads/no-power-to-obd-ii.53049/

https://www.mustang6g.com/forums/threads/obd-port-aint-getting-power.31053/

https://www.mustang6g.com/forums/th...ble-service-advancetrac-dash-messages.110170/

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This M6G member had a non-start failure and after much diagnosis, it was found the cause was due to a wiring harness. The harness that was eventually found was under his S550 and it rubbed on the chassis enough that the wear chafed through the outer protective conduit and rubbed through the wire casings causing a short, which kept blowing a fuse. See post #34 of the below thread:
https://www.mustang6g.com/forums/th...-stalled-and-it-doesnt-start-or-crank.154984/

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