The 'F' Relay is the 00 - 90 unit.

A circuit is not completing. Does the 00-90 unit have a broken off wire? Or from the Ball Count Unit, is it stuck on the last position #6. Sending pulses to the Match Unit.

Check the 'AX' Relay. It is the re-set completely relay.

The Ball Count unit. Here a few more suggestions. While I will admit that I am no expert at this diagnosis, hope this helps.
Can you manually activate the stepping coil? Watch this carefully. Does the brass contacts on the turning part land on the contacts properly? Has the Slate + Black wire in the Ball 5 position become loose? Does the rotating part snap back to its correct starting position? Or is it to far forward?

Its to late for me to fire up the ACD. But I'll check it tomorrow afternoon. But I am thinking and looking at the schematic and it shows the Ball Count unit starting on Ball 1 with the rotating contact on the first contact, with the Blue + Black wire.

Since the problem is with the 5th ball only, I would not blame the trough switch.
The schematic has the ball waiting in the shooter lane and the power cord disconnected.
Look through the EM tech headings there is an Abra Ca Dabra thread with a few photos of the motor and ball count unit.

Look on the switch stack on the backside of the Ball Count unit. The Zero position and 6th Position switches are there, and should both be closed during balls 1-5, then the 6th position should open when the Ball Count unit steps to Game Over (aka the 6th position).

If the 6th position switch is opening early (like on ball 5), then it probably behaves as described.

Bingo! Finally got over here to look at it. The position 6 switch was slightly opening while in position 5. Now that works great! The next thing to tackle was the bad left flipper that had no power. First thing I checked was the EOS switch. It was wide open! I mean not even close lol. I adjusted it and and it didn't work so I was like like wtf? I readjusted and cleaned it this time and, Bam!, instant flipper!

Yes, I was just about to mention the bonus and see you brought it up. I haven't even begun to look at it but the bonus is staying at 1000 and not progressing. I can't look at it tonight but I'll try to look at it tomorrow. Any ideas where to start would be greatly appreciated.

Relay 'B' is for the POP Bumpers. Motor switch position 4A. 10 hits of the Pop Bumpers lights them for 1 hit.

That is normal. Gottlieb did this a lot. 2, sometimes 3 pop bumpers move together.

I keep forgetting to dig out my Abra schematic. Until now.

So the observable symptom is a pop bumper firing. If we start there and work backwards, then maybe the cause will be found.

Both pop bumpers are activated via separate switches on the B relay. So if both are activating, then that suggests B must be activating.

B is activated when either of the pop bumper spoon switches close. After it activates, there is a lock-in path via a switch on B itself, and both EOS switches on the pop bumpers.

The scoring path is also through a switch on B (which activates either the M or L points relays), and the chimes are activated by switches on M and L.

So here are the possibilities:
- One of the spoon switches is gapped too closely, and vibration is causing it to randomly close without the ball nearby.
- The lock-in switch on B is gapped too closely, and vibration is causing it to close, which reactivates B.
- There's a short elsewhere to the B relay.

To confirm which of these it might be, you could block either the spoon switches on the bumpers, or the lock-in switch on B, and see if the problem persists (if nothing obvious appears when inspecting the switches).

Dirt, The pops are not activating by themselves. They only activate when struck. The problem is in that they are intermittent when scoring. Sometimes they score normally and sometimes they just pop and don't score. When I manually triggered them with my finger I've also noticed that once in a blue moon they will score repeatedly instead of just once like they should. I.E. 3,000 instead of 1,000 points.

Ah, I misunderstood your description then. Sounded like they would just start popping.

So there's a switch on B that feeds either the M or L relay, but which one depends on the mini stepper, "I". There's a switch there that rides on the cog (I think). I'd guess that B is firing OK, but the mini stepper is probably not stepping well enough to get the switch closed reliably. Then after enough hits it finally gets to a point where the switch can close.

I'd suggest checking/cleaning the mini stepper.

I'd bet a dime to a donut thats it. I saw that stepper yesterday and was thinking it might be worth looking at. It wasn't on our check list so I passed it by lol.

Knock them all down, then to reset them, you have to hit the lit center bulls eye target. Which will advance the Bonus Unit, and you score the Bonus amount.
(When the game is set to 5 Ball).

Does that mean we get donuts?