'85 300D ACC Woes (compressor will not engage)

[AMH]

1985 300D Type III ACC
Pushbutton unit works fine, ran tests according to factory manual. Flaps open and close normally.
Tach functions normally.
Compressor stopped functiong today. #8 fuse is good, power on both sides. Pressure is good, no leakage detected. I "jumped" the low pressure switch, and the compressor will not engage. Checked the electrictal connections at compressor, they are ok. Looking at the factory manual, I see red/yellow tracer to compressor relay. Checked Klima relay by brake booster,(yes it has Klima printed on the relay, size of a cigarette pack), part number 001-545-74-05 and could not find a red/yellow tracer. I am thinking there should be a way to jump the terminals, possibly this could narrow down the problem. The schematic on the CD is about as useless as tits on a boar hog. The damm thing is barely legible.
Any suggestions? Alan