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4-lo

  1. C

    Revised Starter/Backup Lamp Switch Electrical Schematic?

    I am striking out finding TSB 92-24B-52, which documents revised wiring for the starter/backup circuit. My truck starts correctly in park/neutral as it should. The problem is that 4-Lo does not work (4-Hi does work). The R/W wire which is the park/neutral input to the Shift Control Module is...
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