Quoted from Kickout:Push the start button again no player 2
If the Coin Unit stepup solenoid doesn't activate when you push the start button for player 2, , inspect and diagnose this circuit with Alligator clip jumper wires, starting with this switch on the Reset relay.
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features