Man I wish I could help more than just this guess

Not sure how BK2K works and if a contact on the lower flipper may be causing issues on the upper flipper.

Double check the diodes with a multimeter as maybe they fried as well. Also check the contacts at the flipper buttons and make sure they are making contact. My hunch is that the diode on the coil fried.

If you wired the flipper coil backwards, the diodes are cooked. They can't be tested while in circuit. Snip them off and replace them.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball.htm
http://www.PinWiki.com - The new place for pinball repair info

When you put in the new diode, make sure the banded end points in the same direction.

You screwed it up about as bad as you could

Let me try to decipher what you did:

On the first go round, you switched the EOS wires...Well, that's not an accurate description. Wouldn't matter if you switched the two wires on the EOS...it's just a switch. What I 'think' you meant to say is that you switched ONE wire on the EOS with the wire on the other switch in the stack. That's not an EOS switch but a normally open switch (called the upper flipper switch) that sends power to the upper flipper. The EOS switch on the stack is normally closed.

Soooo....If you switched the wire on the EOS with the wire on the switch to the upper flipper what you did was take the 50V that normally goes through the flipper switch and put it on the EOS. Since the EOS is normally closed, it put 50V straight to ground with no load and popped your fuse.

Now, you fixed that and the upper flipper was only jumping. Which means it was now at least getting the 50V through the flipper switch to the upper flipper. If it was only jumping, then it was getting 50V only momentarily meaning your lower flipper switch is maladjusted. Either that or the EOS on the upper flipper is not adjusted normally closed and you're only getting the low power winding in play on the upper flipper. But you didn't mention that you mucked with the upper flipper at all until later, so my guess is you screwed up the adjustment on the lower flipper switch stack.

Then, you say you swapped coils on the upper but miswired it. You swapped the wires on the outer coil lugs. That means you put the ground on the banded end of the one diode and the 50V on the non banded end. Congratulations, you just created another dead short across both coil windings since the power was flowing through the diode instead of being blocked by them. That's why F5 popped again.

My guess is you still don't have it wired properly. Swapping the wires on the upper coil created a momentary high burst of current before the slo-blow fuse blew, so you could have very well cooked the diodes as Chris suggested. If they're shorted now internally, then you're going to blow F5 every time the lower flipper switch makes. But you say the fuse stays in tact for a few flips which is odd.

Now my head hurts. My suggestion:

Replace the upper flipper coil (hint....NEVER replace a coil in the future unless you test that it is bad. Coils themselves almost never go bad) with fresh diodes and wire it correctly.

Take a picture of the lower flipper switch stack and wiring and the upper flipper switch stack and wiring, post them here and get confirmation that everything's correct before you damage something else.

+1 on taking pictures, lots of them.

Unless you do it all the time, it's hard to remember what goes where - even the simple stuff!

Remember: it's not the triumph, but the struggle...

very poetic, and so true.

The last pic is the best one....

You should have BLK-YEL on unbanded outside lug....That's the ground from the flipper button

You should have BLU-YEL on the banded outside lug....That's the 50V from the lower flipper switch

The solid blue wires are just jumper wires to the EOS and one should be on BLK-YEL outside lug and one on the Inside Lug.

So.....Your upper flipper is wired correctly by that last picture.

You didn't post the bottom flipper but it should be:

BLU-YEL should be on the banded outside lug AND jumpered to the Normally open flipper switch on the stack. From the other side of that Normally open flipper switch is the BLU-YEL wire that goes up to the upper flipper.

BLU-VIO should be on the unbanded outside lug....That's the ground from the flipper button. It should have a wire also to the Normally Closed EOS switch. Other side of that EOS goes to the middle lug.

Sounds like its hold power is out. On the three wires, one is hold power. I'd investigate that.