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Topic: Help wiring in a cruise switch on a99 cc allure (Read 556 times) previous topic - next topic
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Help wiring in a cruise switch on a99 cc allure

I have a 1999 County coach allure with a 350 8.3 cummins in it..  I have the wiring scamitic and numbers and switches for the cruise and the rusume and idle.  cant for the life of me figure out how to wire the switch though.  any help?  the cummins manual is no help and I cant seem toread the cc scemaitic or it is confusing.

Re: Help wiring in a cruise switch on a99 cc allure

Reply #1 –
I think that is a DynoMax chassis /  Cummins ISC 8.3 (350hp).  That means you're dealing with a Cummins Celect Plus and the cruise control is integrated into the ECM rather than a separate cruise module.

AFAIK
  - The ECM expects momentary switch signals (usually grounded inputs) to activate ON/OFF, SET, RESUME, etc.
  - No separate cruise control “box” → the switch wiring goes straight to the ECM or via the connector in the dashboard harness.

The ECM should uses these pins, I can't tell from the picture you posted if this is what it is indicating?
Pin 7   Cruise Enable   Green or Yellow
Pin 9   Set/Coast   Blue or Green
Pin 10   Resume/Accel   Blue or Red
Pin 11   Coast           (sometimes same as Set)

The switches short to ground which signals the ECM to activate that function.