Quoted from snyper2099:So now there is another small issue... now the ball in play and player up lamps are working... However, once any points are made on the playfield (no matter what ball it is) the “ball 3” lamp comes on(along with correct ball lamp) and 3 stays on until a drain, then game goes to next player and when that player scores first point, the “ball in play 3 lamp” stays on for the rest of that player’s ball.
Does the ball 3 lamp come on for any points scored (10 pts, 100 pts, 1000 pts, etc.)? If not that might help narrow it down.
Also, what solenoids fire when the ball 3 lamp light comes on? If it's a relay switch causing the problem it would help to know what relays fire when it comes on and hold until the ball drains.
Looking at the manual, the Outhole relay for example seems to break the hold circuit on the Ball Index and No. 1 relays. Are they active when the Ball 3 light is on?
/Mark