Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

1992 Mazda Miata Cruise Control

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3 years 11 months ago #39620 by kamlanie
I have a 1992 Mazda Miata with the I4 1.6 engine. It has a vacuum actuated cruise control unit. I have checked the actuator and everything seems to be plugged in correctly. when i enable cruise control the light on the dash comes on, but when i try to set or resume, nothing happens. If there is anyone familiar with these old school vacuum operated cruise control units, i would like to know where to start the diagnostic process.

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3 years 11 months ago - 3 years 11 months ago #39623 by tech25
Check if there are any fault codes in the control module. See attached for instructions and codes. Have the test light be a 1.4 watt bulb. Control Unit is located above the fuse panel.
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Last edit: 3 years 11 months ago by tech25.

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