Only 1 of the 3 is lit. The others have good sockets and bulbs. Under the playfield there are 2 red solid core wires that were soldered on the legs of 1 of the bumper sockets. The other ends are soldered on one of the GI bulbs also. The red wires on this socket are in addition to the yellow wires soldered to it on both legs. I snipped the red wires off and still no light. The other one not working has double white with brown strips on 1 leg and double brown on the other. These double brown go to the 1 leg of the working bumper light too and the other leg of it has a yellow wire from a GI bulb. Are these red wires supposed to be there?

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All good. Cut the reds off.