It means the alternator cannot handle running the vehicle alone. This is not a smart thing to do. First you put undue stress on your alternator, heating it up more trying to keep up with your car electrical requirements, and second disconnecting your battery while a vehicle is running is not recommended anymore as it damages sensitive electronic components. Take your vehicle to be checked by a professional before you damage it!
Audio battery???? If you mean Auto Battery then Red Positive (+) RED cable goes to Positive (+) post on battery. Black Negative (-) cable goes to Negative (-) post.
If you mean what battery post the cable hooks up to, it's to the post marked with a negative (-) sign; if you mean where the cable hooks up to from the battery post, it's to the metal frame and usually held in place with a bolt.
Generally, yes.
If you mean reset the computer: remove the battery negative cable for a few minutes.If youhave security codes on the radio write them down before removing the cable. Replace the cable and the ECM should be reset.
Change the positive post? You can change the battery with a new one but you cannot just change the post. If you mean reverse the positions of the positive and negative posts then buy a longer battery cable.
Yes it can be replaced, but which one are you talking about? If you mean the starter solenoid (sometimes called a relay) it is located near the battery. The positive battery cable goes to it. Disconnect the negative cable first, then you can remove the wires/cables and bolts holding it down, noting their position before removal. Reinstall & reattach wires, then reconnect the negative cable & you're done.
Maybe you mean cable. You can bolt a car battery cable to the block of the engine. Usually under the exhaust manifold.
It needs to be cleaned
If you mean a Check Engine light, then yes, they can be reset. Some can be reset by disconnecting the negative battery cable for 5 minutes. Others will require an OBD2 scan tool to reset the light.
it means that you can't charge the battery and you need to replace the dead batteries with new ones
Not necessarily. There are a lot of factors that can keep you from reading 14 volts at the battery, such as corrosion in the cable from the alternator to the battery.
I assume you mean the large battery used to start the car. Lift hood, remove the firewall neoprene seal on the top edge sealing the hood to the engine compartment, then carefull remove the clips on the plastic cover that is on top of the battery, it runs the full width of the engine compartment. Using a 13mm socket remove the hold down clamp on the left (passenger) side of the battery. remove the negative cable then the positive cable (negative first to prevent shorts) stow them out of the way. Note the plus side orientation. Using a battery lift strap remove the battery from it's battery tray. Installation is the reverse of this process.