Yes i figured we could do something like that unfortunately i am not smart enough to do that with out having a little more info. Would u be able to identify the wiring that we need to tie into on the Hamilton and perhaps maybe a rely for dummies explanation . We have two acw an older 5 series and a goldline i would be forever grateful.This happens because two worlds are colliding. The washcard system does not tie into the out of service side of autocashier, unless you use a relay. What we do is tie into the Out of service with a DPDT relay. One side goes to my error notification system (Normally Open) and the other goes to the washcard unit running a wire through the relay (normally closed) to the power of the washcard controller.