KLIMA Basics missing from this forum

[Mxfrank]

Klima handles a lot of barely related functions, including activating transmission kickdown, controlling a/c based on RPM, protecting the belt system if the a/c clutch fails, other odds & ends. I worked out a way to maintain most Klima functionality using two relays. It's more complete than the single relay approach, but still can't deal with the speed sensing functions: https://www.peachparts.com/shopforum/diesel-discussion/386849-compressor-speed-sensor.html#9