Cruise Control Inoperative

Fig. 8 Cruise system schematic. 1981---83 Cruise Master:

1. Check servo chain or rod adjustment. Adjust as necessary.
2. Check vacuum hose for leaks or restrictions. Repair or replace as necessary.
3. Check drive cables for proper routing, kinks or sharp bends. Repair or replace as necessary.
4. Check throttle linkage for binding or improper adjustment. Repair binding or adjust throttle linkage.
5. Check adjustment of brake pedal release switches. Adjust if necessary.
6. Check engagement switch operation. Unplug connector at bottom of steering column and plug in known good engagement switch assembly. If system operates, replace engagement switch assembly.
7. Check fuse. If blown, replace. If fuse blows again, check for short circuit or short in resume solenoid diode.
8. Start engine and check resume solenoid source vacuum, Fig. 8. Remove two wire connector from resume solenoid. Connect ground wire to terminal that black wire was connected to and supply 12 volts to terminal that had other wire connected to it. Disconnect output vacuum hose from transducer. Vacuum should be present. Replace solenoid if vacuum is not present.
9. Place ignition switch in ``Run'' position and On/Off/Resume switch in ``On'' position and Check Engage/Hold wire harness. Disconnect two wire connector at transducer. Push engage/hold button in part way to engage position and check each terminal with a 12 volt test light.
a. If test light is on at only one terminal, test engagement switch. Check for open circuit in wire. Repair or replace part at fault.
b. If test lights at both wires, check transducer for poor ground. If ground is good, replace transducer.
c. If test light is off at both circuits, check for open in brown/white wire from fuse box to On/Off/Resume switch. If circuit is good, check engagement switch operation.