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What will happend if you disconnect the battery terminal from battery while engine is running?
Wiki User
∙ 13y ago
Nothing, if the alternator is good the engine should keep running.On the other hand if the alternator is bad the engine will die/stall.
In a modern car with sophisticated controllers (ECM, BCM, TCM, etc.), NEVER DISCONNECT the battery with engine running. These controllers have semiconductor chips that are sensitive to voltage spikes and transients which become pronounced when battery is disconnected.. Even the power diodes in the alternator can be stressed and eventually damaged.
Wiki User
∙ 13y ago
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How do you disconnect power to the battery on a 99 Plymouth Breeze 2.4 so you can connect things to the terminals?
Power does not go to the battery, it comes from the battery, except when the car is running. At that time power does go to the battery from the alternator. Disconnect the + battery terminal.
How do you check the charging system on a Lincoln LS?
with the car running disconnect the negative terminal from the battery if engine dies alternator is no good
Does a 96 ford crown vic supposed to shut down if you disconnect the battery terminal?
I have a 1995 Ford Explorer , and with the engine running a mechanic disconnected both battery cables and it kept running - I was surprised!
What battery terminal do you take off to shut off the check engine light?
You don't want to do that. If your cars check engine light is on, you need to get it examined by a mechanic. Also, if you disconnect any battery terminal, your engine will not start or power any electronics while it is running.
How do you reboot a car computer?
Disconnect the negative terminal of the battery Leave it disconnected for an hour. (The amount of time it takes to replace the battery). Reconnect the negative terminal of the battery. This works because a transient (voltage spike, noise) is generated when the terminal is reconnected. This is not necessary when the battery is replaced because the negative terminal is normally the last connected. However, when a car's battery dies in storage for example and is recharged with disconnecting the battery, the car might not start because the computer is not running.
Which side of battery do you disconnect to stop the battery running down in a vehicle not being used for a while?
Disconnect the negative cable.
How do you test an alternator on motorcycle?
put a voltmeter on the battery and test voltage, then start the cycle and check again. A battery at rest should be at about 13 volts, with the engine running it will be at 14 or above. to be sure disconnect the positive battery terminal while running, if there is still good volts there, or the engine does not die it is ok.
You Connected the battery to wrong terminal corrected but car is not running right why?
You cross the battery.
Dash Lights Going on and off Headlights dim when driving along.?
I'd check your alternator. Disconnecting the positive terminal while the engine is running will tell you. If the engine dies when you disconnect the battery, it's your alternator. If it keeps running it's something else, like your battery. I had the same problem.
Why wont my Four wheeler battery stay charged?
i had the same exact problem with my 2001 polaris sportsman 400. It is either your voltage regulator or your stator. With your ATV running disconnect the positive terminal on your battery. IF the ATV quits instantly then its probably your stator.
My battery will not hold a charge with a new alternator?
Here is a test u can do to see if Ur alternator is good or not . when car is running disconnect the negative battery terminal it's the black wire.If car stalls then the alternator is bad if it doesn't stall then it's Ur battery is bad and u have to replace it
What do you do if you pull the key out of the ignition but the car still keeps running?
Disconnect the battery.
