Urgent! Mustang died while driving...

[BlackandBlue]

So did the battery fix it?

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[Zinc03svt]

I put mine (original) on a charger/tender a couple times per week. Car just likes a fully charged battery. Easy to do.

 

[AlphaCoyote]

Maybe there is some moisture getting into your body control module. My dad had a similar issue on his F150.

 

[TexasRebel]

So did the battery fix it?

I'm still unclear on that since the symptoms remained after the battery was changed and then inexplicably disappeared, but it seems to have been the case.
She made the 30 mile drive to work this morning without any trouble.

 

[RaceHorseV8]

Did anyone stress test your old battery? That is a reliable test and will give you peace of mind if it doesn't pass.

 

[TexasRebel]

Did anyone stress test your old battery? That is a reliable test and will give you peace of mind if it doesn't pass.

The option was not available on Sunday afternoon. The old battery was turned in as a core.

 

[sigintel]

Those codes are classic dead battery.
Still running ok?

 

[TexasRebel]

Those codes are classic dead battery.
Still running ok?

yes.

Still think it's weird that it just died while rolling under power. I guess I'll be a little more proactive about battery replacements.

 

[ctandc72]

Modern auto electronics can do weird stuff when batteries / alternators go bad. My ex's car back in the late 90's. Going down the road, everything fine - windshield wipers turn on by themselves. Radio cuts on and off. Power locks cycled by themselves. Thought I was going crazy. Alternator apparently toasted the regulator. Replaced battery and alternator, car went w/o issues for another 50K miles or more.

 

[justinjohnson]

Cruising at 35 mph

TC & steering light came on.

Message center displayed "Steering Assist Fault" and "see dealership for service"

Tach went to 0 (engine cut off)

Interior door locks won't respond, Interior trunk button won't respond.

Fob lock/unlock has no response. 2x trunk button will make lights flash, but trunk stays latched (this is the most response I can get from anything)

I've disconnected the battery and waited. Situation remains the same.

I'm very glad I wasn't on the highway. Had to push into a parking lot. I can't even lock the passenger door.

Has anyone had anything like this happen? I've disconnected the battery for the night. Tomorrow I'll try to start it again, but I'm not holding my breath.

I'm having the same issue. Did your issue ever come back?

 

[IPOGT]

Lesson learned. I'll replace my battery every 3 years. Mine flat didn't start one day. Drama less, but not worth the aggravation rolling the dice I get that lucky next time.

 

[Cobra Jet]

For future reference regarding battery or electrical problems, check out this very informative thread found in the GT350 section:

https://www.mustang6g.com/forums/threads/car-is-dead-need-help.137125/

There’s a lot of info, diagrams and tech in that thread - but it can apply to any S550 as the charging systems are the same.

 

[TexasRebel]

I'm having the same issue. Did your issue ever come back?

No issue has come back. Battery is still the most likely culprit.

 

[justinjohnson]

No issue has come back. Battery is still the most likely culprit.

Thank you!

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