Initial Inspection and Diagnostic Overview

DIAGNOSIS OF THE CRUISE CONTROL SYSTEM
Problems can be either mechanical, electrical and/or vacuum. In resolving any cruise system operating problem, first complete the following initial inspection.

INITIAL INSPECTION
-> Check for bare, broken, or disconnected wires.
-> Check for pinched, damaged, or disconnected vacuum hoses.
-> Make sure servo and throttle linkages operate freely and smoothly.
-> Check "IGN/GAUGES" 20 amp fuse.
-> Verify check valve functions correctly.

If preliminary inspection reveals no solution, follow the six diagnostic charts, (figures 5 through 15) to isolate and fix the problem. Figure 15 has also been provided as supplementary information on what the controller, servo, and control switch voltages and resistances are when the system is operating correctly. These charts are helpful in isolating electrical problems.

A quick-check box is made available through Kent-Moore Tool Company under tool number J-341 85 (or equivalent). This quick-check box will plug in place of the controller and determine which part of the system has a problem. Instructions on the operation of this tool are provided with the tool.