Replacing a car battery requires disconnecting and removing the old battery and replacing it with a new one. The steps are simple, and it is a job that only takes a few minutes.
Changing an automobile battery must be done when the engine is off and only requires a few tools.
- Gather the equipment
To change a car battery, gather the following equipment:
- New battery
- Terminal puller
- Box wrenches or a socket set
- Safety glasses
- Auto battery connector cleaner and brush
- Connector protector (optional)
Turn the engine off and open the hood. Locate the positive and negative cables on the battery. They will be marked with an "+" (positive) and a "-". (negative) symbol. The positive cable may be red and the negative, black.
Using a wrench or socket, loosen and remove the negative cable first. Do not allow metal tools to touch the battery posts.
Remove the positive cable from the battery.
Most cars use a hold-down strap or some kind of retaining system to keep the battery in place. Remove this strap.
Remove the old battery, being careful not to bang it around. Remember, car batteries are extremely heavy, so ask for help if necessary.
Carefully insert the new battery into the car and attach the hold-down strap or battery restraining system.
Before attaching the cables, check to make sure each is clean and free of corrosion. Remove the battery's safety caps.
Connect the positive cable first and tighten. Connect the negative cable next. Check to be sure the battery doesn't move around in its compartment.
Once the battery and its cables are secure, start the engine.