Guitplayer - my truck did not have anything in place when I got it, the kit I received was installed about 2 years ago, long before I had everything else installed in the dash or windshields in place. Because the system was all new (wiper motor, linkage, wiper arm pivots, etc. and the kit came with the switch it seemed straight forward at the time. Now that I have glass and wiper arms I am finding that I need to probably change some of the assembly but it not nearly as accessable now with all the instrumentation, heater, defrost ducts, etc. in the way. I was hoping to be able to find an instruction sheet but so far no luck. I probably will contact Classic Parts to see if they can email me a copy.