All cars, including a Toyota Rav4, need a battery to start the engine. It provides the power to engage the starter motor in the engine, which then turns the engine over. The battery then provides high energy to the spark plugs that ignite the fuel in the engine's combustion chambers. Once the engine has started, your Toyota can run without a battery, but it's not recommended. If your Toyota Rav4 won't start after disconnecting the battery, you need to reconnect the battery cables.
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Things you need
- Protective gloves
Open and secure the bonnet of your Toyota Rav4. Wear a pair of protective gloves. Locate the battery and the two disconnected battery cables. One cable is red and connects to the positive battery terminal: the other is black and connects to the negative battery terminal.
Connect the black battery cable to the negative battery terminal using a suitably-sized wrench. The terminals are clearly labelled.
Connect the red battery cable to the positive battery terminal using the wrench. Check that both connections are secure.
Close your car's bonnet. Start your Toyota Rav4 in the usual way. The car will start now that the battery is reconnected.
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