Quoted from Barakawins1:
Was playing my black knight tonight. Encountered the spinner not scoring or making sound (Switch 13 in manual). Also, Left kicker switch not scoring or making sound (switch 21). I ran switch test and found switch right coin switch (04) stuck on. However, I have no switch at this location at all. I also tested the spinner and kicker manually. Neither score points or make sound. The contacts were cleaned for these switches which made not difference. Anyone have an idea on what
could be causing this? Everything else plays fine. Sound test is good.
Multiple switch problem:
Isolate the problem in two sections: #04 and #21 #13
#04 Showing in test/short in coin door wiring:
Suspect this short was already existing before the new problem #21 #13
Disconnect the coin door harness plug check if #04 goes away.
#21 #13 dead:
Suspect broken wire diodes ok:
Check the ball shooter trough switch isn't pinched.
2 switches not registering #21 #13:
Look at each switch that uses the same Row wire White with green stripe:
Check for a broken white with green stripe wire at each of the working switches #29 #37 #45 that must connect to the non working switches.