87 300D - Cruise Ques, its not amp or actuator :(

[a2t]

No working cruise in my 87 300D turbo.

Tested actuator per GDL-online. Works fine. Replaced cruise amp with rebuild from Benz-store ($155, nice!). Still no flippin cruise.

What else could it be? I tested cruise stalk and it seems to work fine - basically probed the 14pin on cruise amp plug for inputs from the stalk. Worked just fine.

Also shorted wires from plug on amp to actuator to get it to move throttle, does it just fine.

Could it be the speed sender? Anything else I should be looking for?

Help me..the gas pedal has 10lb spring in it, lots of long drives killing me...