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tach and speedo not working

This is a discussion on tach and speedo not working within the General Help forums, part of the LSx Technical Help Section category; Hey im new to the LS1 scene...just recently bought a 98 trans/am and when i bought it the speedo and ...

  1. #1
    hrsepwrfrk
    Guest

    tach and speedo not working

    Hey im new to the LS1 scene...just recently bought a 98 trans/am and when i bought it the speedo and tach didnt work...any ideas? they are just stuck at 0

  2. #2
    hrsepwrfrk
    Guest
    anyone at all?

  3. #3
    Senior Member
    Join Date
    Jul 2005
    Location
    Jacksonville, FL
    Posts
    2,725
    Well, thumbing through my helms it says the first thing you need to do is an IPC (instrument panel check) with a scan tool. For example under the tach diagnosis it says to sweep the tach with the tool, if it doesn't sweep then replace the instrument cluster. Speedo diagnosis is a little more complicated, but you get the idea. The tool will also read any codes present. Other than checking all your fuses and the connector/wiring to the panel don't know what else to tell you. Hope this helps...

  4. #4
    Senior Member
    Join Date
    Jul 2005
    Location
    Jacksonville, FL
    Posts
    2,725
    Just thought of something else, have you tried resetting the PCM?

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