Chrysler Repair: no starter: 99 Chrysler t&c, solenoid switch, fuse box

Question
I recently purchased a 1999 town /country. I bought it not running. The previous owner got tired of it and sold it as is. I got it home charged the battery and it fired up after setting for 2 months at the previous owners. This morning it will not start. the batt. is up, the lights work but it will not attempt to turn over on the key. The previous owner told me of the new parts that had been installed. New starter, new fuel pump. The van has only 106xxx miles and is in very goog shape. When I did have it running it ran and started well, but I'm back to "0" this morning. The previous owner also said that an "expert" told her that it was the computer and parts were around $400.00. Please help if you can from my limited description of the problem. My working on cars goes back to the 50 and 60s. But am willing to try if I can get some guidance.

Answer
Hi David,
I assume that by 'not turn over' that you mean the starter motor won't activate.
Begin by checking to see if the starter motor relay clicks when a helper tries the key. It is located in the power distribution box under the hood near the battery. The relay is the 5th counting from the rear of the box. Listen or feel it.
If it clicks then try substituting it with another relay that has the same part number to test the relay's internal points aren't oxidized. If that doesn't change things then check at the starter motor solenoid switch to be sure that 12V arrives on the brown wire when the key is used. If it does, then the solenoid at the motor is bad or the main power from the battery to the stater is not getting there on the fat red wire.
It the relay doesn't click, then try to substitute another relay to see if that one clicks which would say that the actuation coil of the starter relay is bad.
If the substitute relay doesn't click, then check fuse 10 in the fuse box under the dash. If that is good then remove the relay and see if when you try the key there is 12v on the outboard pin of the relay socket (to test the igntion switch contacts) and  also see if the inboard pin reads a short to ground when you try the key (if it doesn't read a short to ground then try moving the gear shift lever a little off the detent position in either park or neutral to test if the park/neutral safety switch may be out of adjustment so that the circuit to energize the starter relay won't close).
Those are the basics of the starter motor.
Roland