Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to change a cummins 12 valve thermostat [title] Disconnect the negative (black) cable from the engine's battery. [title] Drain the engine's coolant into a container. [step] Close the container as soon as liquid stops draining from the truck.

Ending1: [title] Reconnect the positive and negative terminals of the battery under the exhaust tubes by removing the negative (white) cable with the positive and negative terminal attached to the battery tubes. [title] Clean out the drain tube tubes by pulling one fuse flush with a new fuse. Ending2: [title] Try this simpler method, but may seem old fashioned. [title] Detach the radiator's fuel hose from the engine. Ending3: [title] Disconnect the motor shaft fittings from the engine. [title] Fill the loading chamber with fresh fuel and oil. Ending4: [title] Lift the belt tensioner with a 3/8-inch (9.53 mm) breaker bar and remove the drive belt. [title] Disconnect the engine's upper radiator hose from the thermostat's cover.

Answer format: ending1/ending2/ending3/ending4