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Home >> GMC >> 1992 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control System - Electric Motor Servo >> Testing >> Sierra, Suburban, YUKON & "C" & "K" Series Blazer & Pickup >> Cruise Control Does Not Engage

Cruise Control Does Not Engage

  1. Ensure GAGES fuse is okay. Turn ignition switch to RUN position. Turn on cruise control. Check for battery voltage at Pink wire terminal of cruise control switch connector and cruise control module connector.
  2. If battery voltage is not present, repair Pink wire. If battery voltage is present, check for battery voltage at Gray wire terminal of cruise control switch connector. If battery voltage is not present, replace cruise control switch.
  3. If battery voltage is present, check for battery voltage at Gray wire terminal of cruise control module connector. If battery voltage is not present, repair Gray wire. If battery voltage is present, check for battery voltage between Gray and Black/White wire terminals of cruise control module connector.
  4. If battery voltage is not present, repair Black/White wire. If battery voltage is present, check for battery voltage at Gray wire terminal of cruise release switch connector. If battery voltage is not present, repair Gray wire. If battery voltage is present, check for battery voltage at Light Green wire terminal of cruise release switch connector while depressing brake pedal.
  5. If battery voltage is present, go to next step. If battery voltage is not present, ensure brake pedal is not depressed and brake switch is not out of adjustment. See BRAKE & CLUTCH RELEASE SWITCHES  under ADJUSTMENTS. If brake pedal is not depressed and brake switch is not out of adjustment, replace cruise release switch.
  6. Check for battery voltage at Light Green wire terminal of brake switch connector while depressing brake pedal. If battery voltage is not present, repair Light Green wire. If battery voltage is present, check for battery voltage at Brown wire terminal of brake switch connector while depressing brake pedal.
  7. If battery voltage is present on vehicles with automatic transmission, go to step 9). If battery voltage is present on vehicles with manual transmission, go to next step. If battery voltage is not present, adjust brake switch. See BRAKE & CLUTCH RELEASE SWITCHES  under ADJUSTMENTS. Replace brake switch if it cannot be adjusted.
  8. Check for battery voltage at Brown wire terminal of clutch switch connector while depressing brake pedal. If battery voltage is present, go to next step. If battery voltage is not present, adjust clutch switch. See BRAKE & CLUTCH RELEASE SWITCHES  under ADJUSTMENTS. Replace clutch switch if it cannot be adjusted.
  9. Check for battery voltage at Brown wire terminal of cruise control module connector while depressing brake pedal. If battery voltage is present, replace cruise control module. If battery voltage is not present, repair Brown wire.
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