As for the all down, not resetting, the game must sense all targets are down. If you don't have good contact for each horseshoe for each target in the down position, they won't reset. They get temperamental, it is a common problem with this era's drop targets.

Below is the wiring for the four drops from left to right, 01 being left and 04 is right.

Here is a description in case you can't see the colors:

Left target:
Green - yellow
White
2 x Green - black
2 x White - blue - diode

Center target:
2 x Green - red
White
White
White - gray - diode

Center - right target:
2 x Green - black
White - orange
White
White - brown - diode

Right target:
2 x Green - orange
2 x White - orange - diode
White
2 x White - yellow - diode

01-left.JPG

02-center .JPG

03-center-right.JPG

04-right.JPG