First try shifting to neutral. If that works, suspect the neutral safety switch.
Next, find the starter relay under the hood in the fuse box. There are two ways to attack this problem. One is to pop the cover off the relay, reinstall the relay into the socket, and squeeze the contact. There are actually three circuits. If the starter cranks the engine when you squeeze the contact, you will know the high-current starter circuit works, and the medium-current circuit that runs the starter solenoid, (which turns on the starter) is working. That just leaves the low-current circuit from the ignition switch.
The second method involves removing the starter relay, then taking four measurements in the socket terminals with a test light. This all assumes there isn't some silly anti-theft system preventing the starter from engaging.
Please consider a to help us answer more questions.
Saturday, January 22nd, 2011 AT 5:41 PM