Sometimes nothing and sometimes you will just blow the main fuse. Sometimes you can do serious electrical damage to other components. Depends on the vehicle.
dead battery or try taking the battery terminals off and cleaning the terminals and battery cables with a wire brush and rehook.
If terminals of the battery are reversed, it will short the device that is using the battery. On a car reversing the cables can blow fuses, melt wires, and fry computers.
The starter or battery cables/terminals are corrode.
Clarify please, 2 cables go to 2 terminals on battery.
To replace the battery cables on a 1999 Mercury Mountaineer, loosen the connectors at the terminals. After this, remove the other end of the cables and install new ones.
You must get a couple of so-called jumper cables. The cables have strong clamps on them and are designed to be clamped to the battery terminals. Attach the black cable to the negative terminals of the motorcycle and car battery first. Then attach the red or positive cable to the positive terminals of the motorcycle and the car battery. In case your motorcycle battery is empty, you can now start the bike from the car battery. Disconnect the cables in reverse order, beginning with the red cable. The motorcycle battery will not be charged much by the car battery but the bike can be jump started by using this method.
To replace the 2002 Pontiac Montana battery disconnect both the battery cables from the terminals. Then, remove the screw to the battery holder, located behind the battery. Slide the battery slightly to the front of the vehicle and lift up. Reverse this procedure to put in a new battery.
Connect the bad battery to a good battery with jumper cables. Connect the positive terminals first, then the negative terminals. Now try to start the engine. When finished, disconnect the jumper cables in reverse order.
Replacing battery terminals??? How did you accomplish that. Do you mean you replaced the battery or are you referring to the battery cables? If you replaced the cables are you sure you have them connected correcty and tight. Especially the ground connection. Take a reading with an ohm meter from the neg battery post to the engine or chassis. If the circuit is open, you have a bad connection.
Jumper Cables. If your battery has died, you may be able to use jumper cables to jump start it from some good Samaritan_Ü_s vehicle. If you can safely use jumper cables on your vehicle, make sure that the battery on the good Samaritan_Ü_s vehicle has at least as much voltage as your own.
Best and easiest way to change battery in any Volkswagen. Remember if your computer loses power it will go into limp mode and you will find yourself at the dealership for vag-com. Have a friend with a good battery and a set up jumper cables and hook cables from his battery to yours, loosen battery terminals on your battery and carefully remove battery with out knocking the cables off (remember keep power to the battery cables on your WW). Carefully install your new battery and tighten the terminals. With jumper cables still hooked to your car start your engine, then remove the jumper cables. I would then take car for a short drive to ensure that there is a full charge to the battery you just installed.
Clean battery terminals, then tighten down the battery cables. With the ignition key---like any other time.