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Home >> Buick >> 1992 >> Roadmaster Base >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Trouble Shooting

Trouble Shooting

NOTE: If third brake light is inoperative, cruise control will not operate.
  1. To resolve any cruise control system malfunction, perform a visual inspection of all components. Check system to ensure there are no bare, broken or disconnected electrical wires or poor connections.
  2. With ignition switch in RUN position, battery voltage is applied to terminal "F" of cruise control module. When cruise control switch slider is moved to ON position, battery voltage is applied to terminal "A" of module connector.
  3. If brake pedal is not depressed, battery voltage is present at module terminals "D" and "G". When cruise switch slider is moved to R/A position, battery voltage is applied to terminal "C" of module.
  4. With SET button depressed, battery voltage is present at module terminal "B". With vehicle moving faster than 25 MPH, voltage at module terminal "K" will oscillate from 0-5 volts. Module ground is at terminal "E".
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