Double relay light switching system for providing daytime running lights for vehicles

  • US 5,912,534 A
  • Filed: 03/17/1997
  • Issued: 06/15/1999
  • Est. Priority Date: 03/18/1996
  • Status: Expired due to Term
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First Claim
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1. A relay switching system for providing daytime running lights for vehicles having an exterior lighting system including headlights, tail or parking lights, a power supply, an ignition switch and a starter motor switch, the switching system comprising:

  • at least one primary relay connected between the vehicle power supply and at least the headlights of the exterior lighting system, said at least one primary relay having an input connected to the ignition switch so as to receive power from the ignition switch to close a normally open contact of said at least one primary relay in response to the ignition switch being in an ON condition, said at least one primary relay having a ground connection through a secondary relay having an input connected to the starter switch whereby when the starter switch is closed, the secondary relay is open to ground thereby extinguishing power through said at least one primary relay to the exterior lighting system whereby said at least one primary relay provides power from the power supply to at least the headlights of the exterior lighting system when the ignition switch is ON and the starter switch is OFF.

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