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  1. Olsen9420
    Post

    99 Peterbilt 379 Wiring Issue

    That's correct. When hooked to trailer A everything works on truck and trailer. Hooked to trailer B, only headlights. Unhooked from both, only...
    Post by: Olsen9420, Sep 7, 2017 in forum: Heavy Duty Diesel Truck Mechanics Forum
  2. Olsen9420
    Post

    99 Peterbilt 379 Wiring Issue

    Will do thanks!
    Post by: Olsen9420, Sep 7, 2017 in forum: Heavy Duty Diesel Truck Mechanics Forum
  3. Olsen9420
    Thread

    99 Peterbilt 379 Wiring Issue

    We have a 99 Peterbilt 379 with a 3406E Cat. The issue we are having is in regards to marker lights. When hooked to one of our trailers, all the...
    Thread by: Olsen9420, Sep 6, 2017, 4 replies, in forum: Heavy Duty Diesel Truck Mechanics Forum
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