[randman1]

The circuit basically goes:

ignition switch ---- start enable relay ---- park/neutral switch ---- starter.

My first thought is the ignition switch is becoming worn. But first, just try cranking with the gear selector in neutral instead of park. With a test light you can test the crank wire as it travels to the starter. Begin by removing the trim panel under the column. Probe the thick yellow wire and turn the key to Crank. Observe the light to see if there is a delay at this point (ignition switch test). If not, recruit a buddy and check the thick yellow wire at the park/neutral switch on the trans. Have the buddy crank and communicate to you exactly then he/she gets to the crank position. Again observe the light checking for a delay (start enable relay test). Next up is the thick purple wire at the same switch (park/neutral switch test). If you have not experienced a delay in any of these test areas than the problem is most likely in the starter.