The top left jet bumper solenoid is not firing. It's #17 solenoid. The other joining solenoids # 19, 21, 22 all are working fine. The switch for that bumper #17 is also registering fine. I swapped the coil and made no difference. I checked the connectors on the Aux power driver and they seems fine. With the other solenoids working and the bumper switch working I'm a little confused. Does anyone have some ideas?

The red/white power wire looks like it comes from the backbox board and daisy chains to all the jet bumpers. Starts from the bad coil, so if the other coils are working... Checked continuity like you said and I have continuity from the red/white at the coil to all other coils but what seems strange is that no continuity at the J5 connector when pulled from the backbox board but there is at the J5 #1 pin. If no continuity at the J5 connector none of the coils would be working. I must be on the wrong connector?

Still having issues. All coils are good. All wires are good. What is it on the circuit board that tell a coil to fire? It has to be something on a board.

I have tried in test mode and it’s a no go.

After setting this aside for a few months I'm back at it. Still can't figure out why the upper right pop bumper will not fire. All coils have voltage. I replaced the suspect coil with no luck. I have looked through the manual trying to understand which connectors are involved and I think it's like this:

1. The red/white power wire that power sol#17, 19, 21, 22 (upper bumpers and ramp) is the J11 on the Aux Power Driver board to J5 on the Interconnect board to J11 on the same board to the pop bumpers. I have checked and reseated all the connections plus the fact that all those other sol work I ruled those connections out.
2. The switch wire (blue/brown) seems to go to J7 on the Aux Power Driver board. The other pop bumpers are also on that connector but I reseated all the wires to be sure.
3. In test mode you can push down the colored bumper wafer and it will register the switch # and make the bumper fire. When you push the one in question it tells you it's switch #49 but the bumper will not fire.

So if there is power to the coil and the switch is registering, what is it that tells the bumper to fire when the switch is triggered?

I'm hoping someone can look at this and see a gapping hole in my process and give some advice.

I tried it with the pin on but not in test mode a few months back, I will try it again in the morning. I did pm him a couple days ago because as I recall it didn't fire. I will definitely check continuity as well. Thanks for the response!

The good news is touching the ground lug on the coil with a ground wire does cause the coil to fire. I have continuity from both sides of the coil to many different connectors on the board because of daisy chains i guess.

The bad news is that I must be doing something wrong when trying to ground the transistor. Because when I tap any of the upper pop bumpers transistors Q75,Q73, Q77, Q79, none of them fire and we know that only the top right is the trouble maker. I tried it after just turning on the machine, game mode, test mode for coils and switches. I moved the ground to different places on the ground strap.

I realize now I failed to mention that these are not stock boards. The driver board is Rottendog and the Aux driver board is pinballpcb.com Kohout Enterprises. Don't know if that info makes difference?

Yes, with door closed