Trailer: rear top marker lights inop, front top lights working fine.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by bluenova1971, Dec 6, 2024.

  1. bluenova1971

    bluenova1971 Bobtail Member

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    2014 Wabash van. Are all the top marker lights on the same circuit?
     
    bluenova1971, Dec 6, 2024
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  2. Hammer166

    Hammer166 Crusty Information Officer

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    IIRC, the front lights feed up the front of the trailer, and the rears come out of one of the taillight boxes. May be on same circuit, but feed from different places. Find where the harness splits at the rear and you'll likely find the issue. Don't forget to check grounding.
     
    Hammer166, Dec 7, 2024
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