Because you may have a bad cluch swich. aka netrual saftey swich its really easy to replace its right behind the cluch petal a plastic peice with a big button with a wire attached to it this could be bad a way to test it is to put car in netrual to be safe do not push in cluch and start car if it starts that could cause your cruise to not work that means that the swich is bad because its there to insure you have cluch in so you dont take off in gear when you start your car and for other reasons aswell
won't work
90 Percent of cruise control problems caused by defective cruise control release switch located near top of break pedal.
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.
cruise control does not work on 98 astro van
Another thing to check is the actual cable from the cruise control module to the throttle body. It will be right next to the accelerator cable on the throttle body.
Cruise will NOT work if the speedometer has a problem
the crusie control band is probly broken
cruise control does not work when headlights are on
Have you tried pressing the cruise control button on the dash?
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.
Because it is very high-speed car and it does not require the specified option. It is created for dynamic driving and is not a sedan.