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Discussion Starter · #1 ·
So you're driving along after installing a nice new amp or something in the car, and you forgot to tighten the negative terminal connector on the battery...

It comes disconnected while you're driving.

What happens?
Car stalls out? Lose power steering?
Everything keeps running because the alternator is still going?
Accessories die but engine stays?

Just curious.
 

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The car will lose power steering, the lights will go out (if on)... etc. etc.

It is a bit scary.. LOL.
 

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You can do a test to experience it.

Choose a closed course with wide open area.

Go a slow speed then put it into neutral. (Or if you're an AUTO then you can keep it in drive or pop it in neutral while moving)

Then turn the key in the ignition off one click.

The engine will stop, you will lose power steering, and you will just coast silently.

I used to do this at my school when I had to park there at 5am a long time ago (10+ years ago). (Not with this car of course)

I would accelerate fast, and then once I knew I had enough speed to park, I would turn the ignition off then coast silently about 500 yards until I brake and park. haha
 

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The car should still run with the battery disconnected...the battery is just a load when the car is running. The alternator powers the car when running. This is a common way to test if you have a bad battery or alternator. The car only uses the battery to start, after that its all alternator.
 
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