That will burn out the bulb because this circuit runs on full line 120v power.

It's hard to tell from your picture because of glare, but it looks like the fuse near the coil is blown. Check the Motor 4B switch and the fuse by the coil.

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Available here http://www.pbresource.com/eldorado.html

Sounds like a broken common wire on the drop target bank.

The drop target scoring also runs through the Advance unit disk and wiper. If some work and others don't it should be easy to find the difference with the usual techniques of alligator clip jumper wires and blocking switches open with paper.

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