Re: (redhotjose9)
No, this is just a test to see if the starter motor will turn the engine over when you jump those two terminals. And just as a thought here, before you do the test make sure that you can you turn the engine over fairly easily by hand (with the gearbox in neutral), just to make sure that it's not an internal mechanical problem in the engine itself.
If it won't turn over at all then the motor is done, if it turns over slowly then it's on it's last legs or it's not getting enough voltage, and if it turns over at a good rate of speed, then the problem is somewhere else. And if it does turn over OK, you could then turn the ignition to "on" and jump it again to see if it will fire up, still with the car in neutral and the parking brake on, etc..
If that works, turn the engine off and try to start it with the key. If it won't start then you most likely have a sticking or failed starter solenoid. Also, if the starter motor runs when you try it by either jumping the two main cable terminals or with the key but doesn't turn the engine over, then there's either insufficient voltage to the starter motor or the starter drive is done.
Maybe I should add a brief re-cap here. The starter assembly consists of an electric motor, the shaft of which also has a sliding pinion gear which, when activated, engages the ring gear on the flywheel thus turning the engine over, and a solenoid. The solenoid does two things when power is fed to it's terminal: the first is that it closes the contacts between the two main terminals which feed power to the starter motor so it will run, and the second is that it activates a lever which moves the starter pinion out along the motor shaft to engage the ring gear. In order to start the car with the key, the motor, the solenoid, and the lever/pinion (the starter drive), must all be in good working order.
Modified by John2x240 at 11:36 PM 7-26-2009