Trailer clearance lights out

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Qbf594, Apr 23, 2021.

  1. Qbf594

    Qbf594 Road Train Member

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    Since all 5 top across the back clearance light and the red lights at the rear right and left side are ALL out that seems like a fuse.
    I don't see a listing in the fuse panel (cab-2018 Freightliner) for ANY trailer wiring except ABS.
    Am I looking in the wrong place?
     
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  3. SmallPackage

    SmallPackage Road Train Member

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    Usually the black wire in the pigtail or trailer plug.
     
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  4. Qbf594

    Qbf594 Road Train Member

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    I'll see if I can find it. Thank you
     
  5. SmallPackage

    SmallPackage Road Train Member

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    The brown one usually if wired correctly will power the lower tail lights, side markers, and license plate light. The black powers the others.
     
  6. Qbf594

    Qbf594 Road Train Member

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    Ugh. Not like a flatbed trailer. Can't follow anything. Everything is up inside the trailer structure or maybe in the bulkhead wiring box. Guess I'm asking boss man to take it from here LOL
     
  7. ZVar

    ZVar Road Train Member

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    There is a fuse or two for the trailer on the firewall in the engine compartment. Drivers side up by the air manifold.
     
  8. Trucker K

    Trucker K Light Load Member

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    As others mentioned check the fuses but I had a similar issue and it was the pins on the trailer couple that had an issue. Another issue was the electric couple prong pins.
     
  9. Qbf594

    Qbf594 Road Train Member

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    I'm guessing it's this. I had to back up like I was a proficient city reefer driver...except I'm only an ok flatbedder and I pulled the pigtail so hard the plastic deformed! I replaced the cord but might have stressed the pins. (Horrible inner city Atlanta warehouse you have to jackknife and keep pushing to square up to the dock. I don't even know why that's a thing FFS ...get a straight truck...)
    Anyway. Thanks for the input. I'm handing this off the guy who owns this problem LOL it's above my pay grade.
     
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  10. Trucker K

    Trucker K Light Load Member

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    Not a problem. Back in the day (One of my last Otr routes for a form company I worked for) I had a reefer load going to a Cold storage in the Atlanta area so I can understand your frustration.
     
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  11. blairandgretchen

    blairandgretchen Road Train Member

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    Thin blade screwdriver and spread the prongs in the male end ?
     
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