* Selector Valve: Most commonly, a selector valve is used. This is a lever or knob located inside the cab, often near the gauges. Moving this valve changes which tank the fuel pump draws from. The position of the valve is usually clearly marked (e.g., Tank 1, Tank 2, Both).
* Electric Switching System: Some newer trucks use an electric system controlled by a switch in the cab. This might be a simple on/off switch for each tank or a more complex system managed by the truck's computer.
* Automatic Switching (Less Common): Some trucks might have a system that automatically switches to the second tank when the first one is nearly empty. This is less common than manual selection.
Important Considerations:
* Gauges: Always monitor your fuel gauges carefully. They should indicate the fuel level in each tank individually. Don't rely solely on the engine running – it's possible to run out of fuel in one tank even if you have plenty in the other.
* Proper Procedure: Consult your truck's owner's manual for the specific procedure for switching fuel tanks. The exact location and operation of the selector valve or switch will vary between makes and models.
* Safety: Never attempt to switch tanks while the truck is in motion. Always perform the switch while the truck is safely parked and the engine is off.
In short, there's no single "switch fuel tanks" method; it's a matter of manipulating a selector valve or switch, according to the truck's design. Always refer to your vehicle's manual for the correct procedure.
