Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to tell if your car speakers are blown [title] Turn on the vehicle. [step] Most vehicles need to be turned on for the audio system to play. Unless your car is particular, you won't need to fully start the engine, which would only waste gas.

Ending1: [title] Locate the mouthpiece located at the rear of the vehicle. [step] The mouthpiece can be found on either the rear front cover or front filter. Ending2: [title] Insert a cd or mp3 device with a full sound range. [step] Pick something that you play often in your car, so you know what to listen for. Ending3: Plug in any electronic devices that are affected by a blown fuse. [title] Start the vehicle with the throttle at about 100 rpm. Ending4: [substeps] Start the car with the key at the bottom back of the battery compartment. Apply the toggle before doing so to make sure you get it started.

Answer format: ending1/ending2/ending3/ending4