Toyota 4Runner Electrical Guides

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  How to Replace Battery

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  How to Replace Spark Plugs and Wires

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  How to Jump Start Battery

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  How to Replace Oxygen (O2) Sensor

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  How to Replace Alternator

  Do have a good battery, but watch your headlights go dim when you sit idle? Could be your alternator.

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  How to Replace Starter

  4Runner won't turn over? Could be a dead starter.