Automotive Wiring Diagram is a user-friendly application that allows you to check the connections on your own car. This can help you diagnose the problem if you have no idea about what is wrong.

You can check the connections for all of the car’s electrical circuits, including the starter and the engine, the ECM, the TCM, the air conditioner, the radiator, the headlamp, the headlights, the trunk, the driver’s door, the horn, the wipers, and the battery. 

You can download this application for free, and you can use it on your Android phone.