Since I no longer have a rear wiper I am trying to use the switch for another purpose. I would like to put another wire in place of the wire that would go back to the wiper to power someting else. I have been sitting in the car for the part 45 min with the test light trying to find out which wire sends the signal to the wiper to turn on. I have this diagram of the system, but cant seam to figure it out.



From this I would assume it is the green/white wire that carries the signal back to the rear wiper, however my test light thinks elsewise. Can anyone help me out a bit on this?