Gen 3 Drive By Wire cruise control HOW TO

[Hart_Rod]

If you have it wired like post #42 (to include 87a to ground, like DayJ1 said) you should be wired correctly for a LED bulb setup. I would put in some regular 1144 bulbs until we verify that your wiring and computer are working correctly. At that point, put your LED lights back in.

Now when you say it doesn't work what exactly do you just mean?

There are other criteria that are required in order for the cruise to work.

The computer has a group of conditions that it uses to determine whether or not it will let you actually "set" the cruise control. Until these conditions are met, it will set "Cruise-lockout" = "yes", preventing you from from setting the cruise control to a certain speed. The computer will not unlock it ("cruise-lockout" = "no") until you are above a certain speed, brake pedal is not being applied or any other criteria the computer has determined that it doesn't want the cruise to be set. Once it meets all of it's required conditions, then it will actually let you "set" the cruise. At this point it "sets", and a PID "Cruise-active" is set to 'yes".

If you have HPTuners or equivalent, you can log all of this PIDs and observe how the cruise control works:

Cruise lockout (yes/no)
Cruise active (yes/no - you have actually set the cruise to a set speed)
Cruise on (you just turn switch on, will come on when you are parked, key on engine off and you push the button)
Cruise accel/res (will come on when you are parked, key on engine off and you push the button)
Cruise set/decel (will come on when you are parked, key on engine off and you push the button)

With that all being said, can you give more information about your setup? Engine/tranny combo?