R&R Starter 1999 Plymouth Voyager w/3.3 V6

The likely problem is the contacts in the solenoid on the side of the starter. Does the solenoid click when trying to start the car? Disconnect one battery cable before doing anything with it. I fixed mine by removing the end of the solenoid case and building up the badly eroded input terminal bolt head with silver solder--worked great. You have to work under the car to get to these parts--use jack stands for safety.