wa0bbi 4/1/2010

2003 Chevrolet S10 ZR5 6Cyl4.3L - Brakes

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No brake lights: replaced . lamps,all fuses, brake light switch. have , turn and hazard . any sugestions

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• 
  Cubby 4/1/2010

  Have you checked for a ground at both sockets?

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  HouseCallAuto 4/2/2010

  Here is the deal you can count on..
  
  Customer Concern: Lower brake lamps are inoperative. Center High Mount Stop Lamp (CHMSL) functions correctly. Rear turn signals function normally. New brake switch tried. No voltage to the Yellow/Black wire with the brakes applied. Tried another CHMSL relay in the Underhood Bussed Electrical Center (UBEC), fixed.
  Tests/Procedures: 1. Test for 12v from the brake switch on the White wire.
  
  2. Test for 12v at column connector, Yellow/Black wire, pin A10 at C211.
  
  3. If OK, replace the turn signal switch.
  
  4. If not OK, test operation of the CHMSL relay in the UBEC.
  Potential Causes: Center High Mounted Stop Lamp (CHMSL) Relay
  Turn Signal Switch
  
  

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