Western Star trailer lights

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Taxco, Sep 20, 2023.

  1. Taxco

    Taxco Bobtail Member

    Sep 20, 2023
    I am working on a 2017 Western star 5700 XE I have trailer marker lights but no clearance lights, what controls trailer lights Sam chassis control module. Anyone have pin out diagram?
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