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? bout light switch

Discussion in 'The Garage' started by 4570burb, Feb 18, 2007.

  1. 4570burb

    4570burb Registered Member

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    Location:
    Grand junction CO
    so i was helping my son install his pedals for his trany swap and founf a what appeared to be a vac line on one of his brake light switch any ideas
     
  2. k30bb468

    k30bb468 1/2 ton status Premium Member

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    It's for cruise control
     
  3. 4570burb

    4570burb Registered Member

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    oh that makes sense as its a 89
     
  4. HarryH3

    HarryH3 1 ton status Author

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    Yep, it's the failsafe for the cruise control. It dumps the vacuum from the vacuum cannister that pulls the throttle open. There's an electrical switch to tell the cruise control electronics to turn off, and vac switch is there as a backup, just in case...
     

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