rbrandonjr Posted July 20, 2022 Share Posted July 20, 2022 My truck blew a steer driver side had it all repaired but I have no brake lights on any trailer hooked to this truck. All wires are hooked up wiring harness from the fire wall to the trailer plug are good. So my question is what am I missing is there something in the dash a air pressure switch maybe. My first Mack besides a 79 model 10 wheeler. Any help would be appreciated. Quote Link to comment Share on other sites More sharing options...
mackey58 Posted July 24, 2022 Share Posted July 24, 2022 Maybe the fuse in the box on the drivers side fuse box on the fire wall 1 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted July 24, 2022 Share Posted July 24, 2022 is the green cord under the hood damaged from a chunk of tire?? Quote Link to comment Share on other sites More sharing options...
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