Jizzo17 Posted 3 hours ago Share Posted 3 hours ago Hello everyone. I recently purchased a Brig to use as a farm truck and am trying to get the tail lights and a 7 pin plug for a gooseneck wired in. Unlike my 85 Mack, this truck does not have a 14 point junction for the wires on the engine side of the firewall. It is set up with a glad hands and the 7 pin connector for a trailer and I could just tie in to that but I was hoping to do it a little bit cleaner than that lol. This truck does have the Cummins and 7 speed with a low ratio single screw rear end. Any help or wiring diagrams would be appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/75236-1985-gmc-brigadier/ Share on other sites More sharing options...
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