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Wiring tests for Cruise control (mechanical 1984) 200

uid 27's pic
posted by  Art Benstein on  Fri Sep 13 10:40 CST 2002
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

Jessie,

I see your point about the opposite effect of the brake switch providing +12 and the clutch switch interrupting either the +12 if the brake is depressed or ground if it isn't.

Looks like a clever trick by the cruise control mfr. If the input to their controller (green wire pin 13) is tri-state responsive, it could accomplish that all with one wire. If this is true, you should be able to measure some voltage above ground and less than battery at pin 13 with nothing connected. With that method Dana could read open circuit, ground and battery as three separate conditions, thereby distinguishing between clutch and brake or both signals.

But I cheat. I found the wiring diagram and with it you can trace the circuit at component level all except the guts of the controller itself. I'll scan it if you like.

Art
--
Art Benstein near Baltimore






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