the reason my cruise is not working.with 12v across the pins to the actuator i can hear the motor spinning and i can actuate the solenoid but its been in there for 25 years.i thought a look inside might be prudent.i have replaced all the caps on the CC board as per James instuction.the rest of the board looks pristine.no charcoal.i have tried a spare board to no avail but cant verify if its any good.i have tested all the pin outs on the board while installed in the car to see if signals are present from the column stick and brake pedal.i have tested the brake switch and it is good.yesterday i cleaned up the left rear stop light assembly,replaced the bulb and cleaned all the grounds which show no abnormal amount of omhs.the history is the cruise was working albeit intermittanly and with some surging.then it just cut out.that was it

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michael cole 1980 300SD gone now but not forgotten,87tdt,90 300te 4matic 95 e320 wagon