For a while now, I've had issues with the backbox lights on my Williams Doozie, though this problem (and the solution, once I find one) could apply to any EM game.
Sometimes the lights are on; sometimes not. They'll come and go during the course of a game.
Note: This is strictly an issue with backbox lighting; playfield lights are OK.
A couple of years ago, I replaced the fuse block, thinking that might have been the problem, and it worked for a while and then the problem returned.
Obviously, I have a flaky connection somewhere. It does not seem to have anything to do with the Jones plug that provides 6 volt power and common to the backbox. If the lights are on, I can't turn them off by pulling, tugging, or wiggling anything on that Jones plug. Connections there seem good and the pins and sockets are clean.
My question is this: Is there a relatively simple way to troubleshoot this problem?
I'm just not sure how to approach it.