2000 daewoo lanos / ccs 100

When you checked your electrical system, what did you check? You must use a digital volt/ohm meter. With the ignition turned off, check the resistance to ground on both the black and violet wire. You should have no resistance to ground on the black wire and less than 10 ohms resistance to ground on the voilet wire. If you have a bad reading on the black wire, repair your ground. If you have a high reading on the violet wire, then you have a problem in your brake light circuit. Check for blown bulbs or bad connections. Turn the ignition ON. For a Open circuit switch - Push and hold the set button. You should get 12 volts on the green wire. Push and hold the resume button. You should get 12 volts on the yellow wire. For a Closed circiut switch you will get 12 volts on both the yellow and green wires while pushing the resume switch. To check for VSS, set your meter to AC voltage. Measure from ground to the gray wire. Moving the vehicle ahead about 40-50 feet and you should see AC voltage. To check the Tach, keep your meter set to AC voltage and ground the black probe. Measure the blue tach wire. You should see anywhere from 1 to 9 volts AC with the engine running. The voltage will increase with RPM. Make sure that the cruise module is not near another computer or high voltage to prevent interference. If you have to change any DIP switches, make sure to unplug the cruise power harness for any changes to take affect. If your vacuum source is good (off engine) then you may have a bad cruise unit. Good luck.sparky

I'm happy I could help.sparky