That ground is essential to complete the circuits. On some cars the heavy duty wire from the battery to ground is supplemented by some lighter gage wires for aftermarket accessories that could also do some grounding. That is the only way I could explain how your car works at all. However being thinner gage, those wires will burn or catch your car on fire from carrying a heavy current. I find it hard to believe that your starter motor runs without a heavy wire connection to ground.
Besides absolutely no power to anything, nothing. There must be some connection somewhere so please look again.What happens if I drive my car with no ground connection on the battery?
Alot of damage.
See, even if the cable were disconnected, and touching the frame of the vehicle, it would not ground because there is no connection to the negative side of the battery.
But when you say drive, I assume you mean the vehicle is running and you have the negative cable disconnected. See, heres what happens, your alternator output is limited by the battery, the battery acts as sort of a capacitor, or a voltage limiter on your alternator. When you remove the negative battery cable, you remove the battery from the system, meaning the alternator will charge "wild". When this happens and the vehicle is driven, some vehicles are capable of putting out in excess of 150 volts at higher rpm's. And you have no protection against this, all your fuses are suited to protect against amperage, 150 volts will flow right through them.
Please, believe me when I say this can seriously damage your vehicle, NEVER remove the battery cable when the vehicle is running.
***ADDED***
Sure, go ahead listen to the people giving me thumbs down, see if I care. But before you dismiss what I say, do this: Go out and remove the cable from the back of your alternator, and then touch a voltmeter between that positive output post and a ground in your engine, and have someone run the engine up to 2,500 rpms, and just see what reading you get. But hey, what do I know..go ahead, ignore me, please, its people who do stupid stuff that keep me in business.
How did the car start with it undone?? Hey larmarin83 I'll give you a thumbs up because you are right,people have no idea do they??? I have the same problem alsoWhat happens if I drive my car with no ground connection on the battery?
if you mean the connection right at the battery...your alternator will not recharge the battery and depending on the car may destroy the alternator....
the car will not restart the nextime you try.
if you mean one of the smaller connections just reconnect it and you will be happily on your way...
um it needs a ground to work. which means its geting a ground off something else. take a look. whats gonna end up happening is the place its getting ground from is gonna heat up to much and fry or get a bad connection and not charge the battery or leave you stranded. its not that much of a problem to fix and youll be glad in the long run. cause its not gonna leave you.
If there is no ground the car wont' start....
It have to be connect somewhere or touch somewhere to the battery...
Every system need a ground loops.
the better the grounding to ur car the better ur car will perform...
tight the ground back..... use thick wire.
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