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Speedo inop

Discussion in 'The Garage' started by dave_90_blazer, Nov 27, 2004.

  1. dave_90_blazer

    dave_90_blazer 1/2 ton status

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    ok, 90 k5, vss , speedo does nothing

    ok I am starting at the vss, anyone have the wiring diagrams?

    first thing I want to check is the wires at the vss
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

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    Do you have access to a scanner?

    Look at MPH from the ECM, if it's not there, THEN I'd start going with specific VSS/DRAC wiring.

    Granted, I know little of the electronic speedo's and their failure rates, but checking VSS operation is easy enough with a scanner that would be the first thing I would test.
     
  3. duece21

    duece21 1/2 ton status

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    I know at my work we Ohm out the old VSS compared to a new one and if the specs don't match then we install new one. Thats the way we test them on rigs. Maybe a parts store will let you Ohm out a new one. I don't see why not your not installing it. I don't know what specs are on pickups.
     

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