If the starter quit after 6 months, then either the replacement starter was faulty, or there's another problem.
It's likely that the starter solenoid is faulty. To test ;-
Disconnect the small wire from the solenoid. connect a temporary wire to the terminal you just disconnected. Touch the other end of the temporary wire to the positive battery terminal. If the engine cranks, you have a problem with the ignition switch or safety switches. If not, use a car jumper cable to connect the battery positive to the starter terminal. If engne now cranks, you have a faulty solenoid. If not, you have (another) faulty starter.
phil_saunders@bigfoot.com
Phil Saunders
September 2008