Quoted from CTHOMAS1998:Thank you guys for the suggestions. I will check them out tonight. pinballinreno , I don't understand what you mean, 'wal-nut" connections?
The harnesses are bundled together with tons of little plastic connectors called wal-nuts.
You will see them as square ends on rear of the harnesses.
Otfen the lighting in the game will go on and off if you just move the big hoses around.
This is mostly due to flakey wal-nut connections on the power or ground wires within the harnesses that go to the power supply.
But can also be loose connections elsewhere else or a wire fell off...
Its somewhat normal with this type of connection.
I replaced all of mine with lev-r-nuts to improve it.
Its a bit of work but now its more stable.
Over-all the game will be stable unless its moved around a lot.
So, if the lights go on or off when you move the hoses around, the wal-nuts may be the culprit.