For 1990-2009 cars

### Disconnecting Procedure

Caution: Batteries produce explosive gases. Batteries contain corrosive acid. Batteries supply levels of electrical current high enough to cause burns. Therefore, in order to reduce the risk of personal injury while working near a battery, observe the following guidelines:

• | Always shield your eyes.

• | Avoid leaning over the battery whenever possible.

• | Do not expose the battery to open flames or sparks.

• | Do not allow battery acid to contact the eyes or the skin.

- | Flush any contacted areas with water immediately and thoroughly.

- | Get medical help.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Record all preset and theft codes from the radio.
2. Turn off all lamps and accessories.
3. Turn the ignition switch to the LOCK position.
4. Loosen the battery negative cable nut (2).
5. Disconnect the battery negative cable (1) from the battery.

### Connecting Procedure

1. Clean any existing corrosion from the battery terminal and battery cable (1) using a wire brush.

Notice: Refer to Fastener Notice in the Preface section.

2. Connect the battery negative cable (1) to the battery.

Tighten
Tighten the battery cable nut (2) to 9 N·m (80 lb in).

3. Reset all preset and theft codes previously recorded to the radio.