I have a later hardtop (I think it's from an 04 or 05) on my 97 Jeep. I found a guy on ebay who makes wiring adapters so I bought one and the wiper & washer are working fine. The question is, my rear window has a defroster but there's no rear defrost switch on my dash. Is that a separate switch that I need to add? Or does it come on automatically with the front defrost (guessing not, since that's vacuum activated)?