Speed control is Chrysler's name for cruise control. The speed control relay on your Wrangler supplies power to the vacuum servo for the cruise control. This servo opens or closes the throttle plate in the throttle body based on commands from PCM when your cruise control is set.
My 2002 Olsmobile Intrique cruise control works some times when you set it, why?
push the cruise button on then the set button on some cars you cant set until you reach 55mph
Make sure you have the main cruise control button depressed. You will then see a display light indiciating "Cruise Control". After that, just use the normal buttons to set, accelerate, and coast. BEWARE, though. The cruise control button for our 2004 Accord stopped letting me keep it in the depressed position, and I can't keep my cruise control on now. Will let you know once the mechanic takes a look at it.
When you get to speed you want to keep, press the button to activate cruise control. You will on the dash light showing that cruise control was activated. After that pull the cruise control joystick down to set the speed. If you pull toward you it resets the current speed.
You use the stick. It has buttons saying cruise on/off use it.
Control Car is another name for cruise control. Cruise control allows you to set a speed and your car stays at that speed. It is good for being on the highway. It also conserves gas.
The computer has probably set a code for the cruise being unplugged.
The ECU has a cruise control speed limiter that will not allow the cruise control to be set after that speed has been exceeded.
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Throttle position sensor
Your cruise control switch could be loose, check the connection, or it could be some type of short.