Peterbilt 579 tailights

Discussion in 'Peterbilt Forum' started by nitram1222, Jul 15, 2021.

  1. nitram1222

    nitram1222 Bobtail Member

    Jan 4, 2014
    I'm trying to replace old regular 4 inch taillights on 2016 Peterbilt 579 . I bought new led 4inch tailights .I just unplug old one and plug in new led tailights but my turn signal is not working on new led tailights. Anyone know how to fix that ?
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