Quoted from PjM:
If acceptable, if some one can take I picture under the playfield how the lights are suppose to be that would be great.
I can't guarantee that mine are wired correctly, because I did a playfield swap and found my pictures weren't quite good enough when I was redoing this. But, they work, and the setup makes sense...
So... disclaimer: not factory original!
All three bumpers are on the orange/white-orange GI circuit.
The right bumper is connected in parallel with two other GI lights on both sides of the Boomerang Bend insert via yellow wires.
The bottom bumper is connected to the orange line of the right bumper via a yellow wire along the far right side of the playfield. It's visible in the second picture. The orange-white wire comes straight out of the harness near the bottom pop bumper coil.
The left bumper has it's own orange wire (single wire) that comes out of the harness near the left pop bumper coil. This is connected under the trough in my pictures. The white-orange wire is shared with the bottom pop bumper, as described above. In my setup with lugs and screws, the only white-orange wire pictures connects to the wire leads from two pop bumpers: bottom and left.
Hope that helps!
Mmmm.... Incandescent goodness!