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Arrangement for monitoring the performance of a vehicle stop-light switch

  • US 5,156,444 A
  • Filed: 07/18/1990
  • Issued: 10/20/1992
  • Est. Priority Date: 11/06/1987
  • Status: Expired due to Fees
First Claim
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1. System for monitoring the performance of at least one of a stop light switch and a signal line between the stop light switch and a control unit which receives the stop light switch signal as an auxiliary input in a vehicle having brakes, said system comprisinga stop light switch which generates a stop light switch signal when the brakes are operated,means for determining whether or not said stop light switch signal is present,an ignition switch,a first fault memory,means for setting said first fault memory when said ignition switch is actuated and a stop light switch signal is present,means for clearing said first fault memory when said stop light switch signal disappears,a drive signal memory,means for setting said drive signal memory when a prescribed vehicle speed is exceeded,a fault indicator, andmeans for activating said fault indicator when said first fault memory and said drive signal memory are set and said ignition switch is subsequently actuated.

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