Cruise Control Switch: Testing and Inspection

1980-87 Models Exc. 1983-87 Ranger, 1984-87 Bronco II & 1986 Aerostar
Disconnect 6 way connector from control switch at the amplifier, then perform the following checks:
1. Connect a voltmeter between light blue-black hash lead and ground, then depress the ``On'' button and check for battery voltage.
2. Turn ignition ``Off,'' then connect an ohmmeter between light blue-black hash lead and ground.
3. Rotate steering wheel throughout its full range while making the following checks:
a. Depress ``Off'' button and check for a reading of 0-1 ohm.
b. Depress ``Set'' button and check for a reading of 646-714 ohms.
c. Depress and hold ``Coast'' switch and check for a reading of 114-126 ohms.
d. On models with ``Resume,'' depress and hold ``Resume'' switch and check for a reading of approximately 2200 ohms.
4. If resistance values are not as specified, inspect wiring, slip rings, turn signal copper brushes, speed control switch and steering column for proper ground. Check for proper ground by connecting an ohmmeter between upper steering column flange and a suitable ground. Resistance should be less then 1/2 ohm. Rotate steering wheel throughout its full range and ensure flexible coupling has a resistance of less than 1 ohm.