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Home › Saturn › 2002 › L100 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P0719: Brake Switch Circuit High › Diagnostic Procedures

Diagnostic Procedures

  1. Turn ignition on, with engine off. Using scan tool, monitor CRUISE BRAKE/CLUTCH SW while depressing and releasing brake pedal. If scan tool does not indicate APPLIED when brake pedal is released, problem is intermittent. See DIAGNOSTIC AIDS  . If scan tool indicates APPLIED when brake pedal is released, go to next step.
  2. Remove left lower instrument panel cover. Disconnect stoplight switch. If scan tool does not consistently indicate RELEASED, go to next step. If scan tool consistently indicates RELEASED, check stoplight switch adjustment, if adjustment is okay, replace stoplight switch.
  3. Using DVOM, measure voltage on stoplight switch connector terminal No. 3 (Light Blue wire). If voltage is more than 0.2 volt, repair short to voltage in Light Blue wire between PCM and stoplight switch. If voltage is not more than 0.2 volt, replace PCM.
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