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Diagnostic codes
Searching in 1990 USDM TSRM.
Areas /Vehicle speed fluctuates when set switch pushed on
Body Electrical System

Vehicle speed fluctuates when set switch pushed on

Cruise control system troubleshooting from BE-64.

Possible causes and remedies
Possible cause
Inspect No. 1 of type A code
Remedy
If OK inspect actuator circuit; if NO inspect set/coast switch circuit.
BE-69 BE-67
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Automatically linked from codes, vehicle context and archive references.
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