Hi,
If you want to simply disconnect the system, there is a vacuum control under the hood with a cable attached to it which runs to the throttle body. I attached a picture below of where the cable attaches to the throttle body and circled it.
Disconnect that cable from the throttle body and the cruise control will no longer work. Basically, you are disconnecting the linkage that ties the throttle and speed control circuit. Thus, is should not work. If something is still causing issues, please let me know.
Take care and let me know if you have other questions.
Joe
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Monday, April 20th, 2020 AT 9:25 PM