>"Also, I have 12vdc going to the module under the dash. Some sort of troubleshooting info would be very helpful."
As you know, stepping on the brake pedal (and/or applying the engine brake) causes the brake lights to illuminate. Typically, this 12VDC "signal" is also sent to the cruise control brain. Suggest testing that this "signal" is present....and not "on" all the time. If it were "on", then the CC would never work.
But troubleshooting in general:
Another blog here at IRV2 had an owner disassembling, cleaning, and re-connecting all connections that had anything to do with the cruise control and even transmission control. Somewhere in that effort, the cruise control began working again.
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Robi & Dale ---- Go Navy ----
2016 Winnie TOUR 42'
Tow: '19 Buick Envision
or: '08 Buick Lucerne
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