HELP! car dead when turning off engine

[happyevdriver]

this is 2016 FFE. when turned off the engine, the car was dead immediately, no light on dashboard, remotes did not work. this happened several times recently. I jump started the car and drove it to dealer to check out the battery. battery checked out good by dealer. I drove back and it worked fine for a few days and then it shut off again. now after two days just parking in my driveway , the small 12V battery still read 12.5V so I think the small 12V batter is alright but the car remote won't work. I opened the door using the key and car won't start, no dashboard. if it isn't the battery, what would it be?

Thanks you for your input.

 

[Anti_Climax]

If it's not the battery, it's the connection to the battery. That's pretty much the only thing that will leave it totally dead.

Check the clamps for tightening and/or corrosion.

 

[happyevdriver]

If it's not the battery, it's the connection to the battery. That's pretty much the only thing that will leave it totally dead.

Check the clamps for tightening and/or corrosion.

Thank you for your quick reply. I'll check the battery connections and report back.

 

[triangles]

Could still be the 12V. Check the voltage with a load on the 12V. But yeah I think Anti_Climax nailed it. Sounds like a bad connection to the 12V battery.