Why won't cruise control work in 2006 ford expedition?

Answer 1

Some of the things you can check; check that the connector is tight at the brake pressure switch located in back of master cylinder on expedition's. Also make sure the accelerator linkage is mounted properly at throttle body and works ok when throttle is open. Check that you have no voltage at the servo motor. with brake light switch depressed, check for voltage. When you step on the brake, a voltage single is sent to the servo motor deactivating motor. Check the speed sensor at the transmission is operating correctly. Remove the connector at the sensor voltage with key on , should be 5 volts. if not check harness connection and spin sensor gear by b hand ,you should get o to 0.5 volts.