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Reference your owner's manual to locate the car battery. Most are at the front of the vehicle, near the engine. Some cars place the battery at the rear, in the trunk area. Still others may require you to pull the driver's side front wheel and fender well for access.

urn the car off and raise the hood using the release lever or button. It's best to tackle this project after the car has cooled for at least 30 minutes.

Slip on your safety goggles, work gloves, and protective apron.

How to disconnect a car battery: Remove the rubber or plastic covers that protect the points where the battery cables connect to the battery terminals. There are two covers to remove.

Identify the negative terminal. It should be labeled with a minus symbol or a black terminal cover. Use a pair of pliers or a socket wrench to loosen the clamp.

Remove the clamp from the positive terminal. It will be labeled with a plus symbol or have a red cover.

To clean corrosion off the battery: Follow the instructions on a bottle of battery terminal cleaner for application. After you spray the product on the terminals and clamps, you may notice a foaming reaction.

Use a wire brush to gently loosen the corrosion on the terminals and clamps. Scrub the terminals and clamps down to bare metal. 9 Aim a spray bottle filled with water at the clamps and terminals to rinse away remaining foam and corrosion. 10 Dry each terminal and clamp with a soft, clean cloth.

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