Majestic L6-4.0L (1990)
Cruise Control Module: Technical Service Bulletins
Cruise Control - Intermittent or Non Operational
Intermittent or non-operation of the cruise control system on 1990 MY Sedan vehicles may be caused by a poor contact at connector LB-21 (bulkhead
harness to cruise control ECU).
Before diagnosing the cruise control system using JDS, ensure that all terminals of connector are clean and fully engaged.