Car Repair Technology Sharing

Today this car parked here well, after a night to play can not start, the owner spent 800 yuan to call a tow truck, the tow truck are to the door of this underground garage, found that the door is too short to enter, today I will see if I can be here on this car repaired, by the way to help the owner save 800 yuan. First try the car, step on the brakes hang p gear to start the vehicle, no response, generally encounter this situation on two reasons, either the battery is dead, or the starting system has problems, we first look at the battery has no electricity, open the headlights to try, the headlights are still so bright, indicating that the battery power is sufficient, that is the problem of the starting system. We all know that the automatic car, only in p gear and neutral to start the vehicle, now is hanging in p gear, let's try hanging in neutral can not start, found that hanging into gear, both can not fire and hanging into gear, I probably know the cause of the problem, I no...