Power window wires to fuse block ID
 

I am trying to straighten some old wiring modifications that came with an old 1979 930 I recently purchased. Trying to isolate power window wires that fasten to bottom side of fuse block. I believe they are a red/white wire and a black/white wire. True? Are there other red/white and black/white wires in the fuse block mix? I can get windows to work very slowly with relay removed and windows to work well when relay is in place - HOWEVER, when relay (black) is in place the rear fuel pump motor runs -which I do not weant to happen since I have two red relays dedicated to the two fuel pumps and figure the third relay, black, should have nothing to do with the rear fuel pump but run the windows only. So, anyhow, trying to isolate the power window motors from rear fuel pump. Any input? Thanks EPS - Tucson