I finished cleaning and re-installing my coin unit so I performed some more tests.
Here is what happens with the coin unit for each flip of the coin switch
-First coin, resets occur on all the units that I expect, including the coin unit. The conclusion is the ball kickout firing. The backglass has the 1 player light on. 2,3,4 are still off
-Second coin, the coin unit advances one step. The backglass now has the 1 and 2 player lights on(2nd player light seems to be somewhat intermittant), 3 and 4 are off.
-Third coin, the coin unit advances one step. The backglass now has the 1, 2,3 player lights on. 4 is off.
-Fourth coin, the coin unit advances one step. The backglass now has the 1, 2,3,4 player lights on.
I played a little at each of the respective coin counts see if the game would run for the correct number of players. In all of the cases I listed above the game progressed through 4 players during game play.
At this point I turned my attention to credits. I attempted to advance the credit wheel using the credit relay(and by adding more than 4 coins) but that did not do it. Instead I shut the game off and manually advanced the credit wheel.
With these manually added credits I applied a similar process with repeated presses of replay (and then after the test re-adding credits).
-First press of replay, game starts, reset coils all fire (I discovered here that my spring tension on my re-assembled coin unit is off). Backglass shows 1 only and the game progressed correctly through a 1 player game
-Two presses of replay, all correct results but a 4 player game.
-Same results for 3 presses and 4.
One thing is clear, the coin unit does get reset.