How to tighten a drive belt<br>Disconnect the battery. Before you get started, disconnect the battery to ensure the engine cannot be started while you're working under the hood. As a precaution, always disconnect the battery before putting your hands in the engine bay of your vehicle.
Be sure to always remember not to refrain from separating the battery terminal cables from the posts located on the battery.
the battery terminal cables connect to the battery posts which is what powers up one's vehicle, so you must not not  forget to separate them before working on your vehicle to avoid danger due to something powering on that should not.
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