If the cruise control on your 1987 300ZX does not work, you might have an issue with the cruise control fuse or wiring. You could also have a problem with the switch that turns the cruise control on and off.
If they both have the same engine.
cruise control does not work on 98 astro van
Cruise will NOT work if the speedometer has a problem
the crusie control band is probly broken
Have you tried pressing the cruise control button on the dash?
cruise control does not work when headlights are on
First step might be checking the vacuum lines in the engine bay. If the cruise control unit does not get vacuum it will not work. Second, the brake light switch might be suspect at that age, it might be sticking or not working. Last, the buttons inside the car or the cruise control unit might have failed.
My 08 GMC Sierra has Active Fuel Management, and it does work while using cruise control.
You probably need to install a new cruise control component.
Does the "cruise" light come on?
90 Percent of cruise control problems caused by defective cruise control release switch located near top of break pedal.
cruise control not working,u need to check the fuses also check the clutch safety switch as this also has to do with cruise control