Hi Klokkie
I do not know about "cleaning wires" --- You work on a Williams pin and these manuals are very good. Lets say You have an "problem with the Eject Holes on top of the playfield" - ipdb has to Jackpot https://pinside.com/pinball/forum/topic/wiring-cleaning#post-4250325 the schematics --- You look-up the wires / switches of interest --- the ipdb-manual starting from page-17 (ori-15) shows every relay and all their switches - drawings of exact position of every switch --- and wirecolors is not very important (?). Greetings Rolf