GlennWest Posted April 15, 2016 Report Share Posted April 15, 2016 Where is brake switch? I found an air brake controller behind dash that works parking brakes, trailer air supply. Also directly ahead of brake pedal under hood is an air brake valve. Lots of air lines going to it. exhausts air out of it when brakes applied. Link to comment Share on other sites More sharing options...
GlennWest Posted April 16, 2016 Author Report Share Posted April 16, 2016 Well, I'm going to tee into the line coming to the brake pressure gauge unless someone says different. Can't find brake light switch. Link to comment Share on other sites More sharing options...
CrazyCooter Posted April 16, 2016 Report Share Posted April 16, 2016 Well, I'm going to tee into the line coming to the brake pressure gauge unless someone says different. Can't find brake light switch. That's where I did mine. Quick and easy! Link to comment Share on other sites More sharing options...
GlennWest Posted April 16, 2016 Author Report Share Posted April 16, 2016 Well think I found brake light switch. Not like the Volvos I have seen. Just electrical screwed into air device. All on firewall connecting to brake pedal. May run red line there. Link to comment Share on other sites More sharing options...
GlennWest Posted April 16, 2016 Author Report Share Posted April 16, 2016 Well that line to gauge is smaller than what fittings I have. Pulled a 3/8 line off and no air, push pedal, air. Teed in and working unit. I didn't hook up red wire. Link to comment Share on other sites More sharing options...
Mark and Dale Bruss Posted April 17, 2016 Report Share Posted April 17, 2016 The red wire is to activate the brake lights if you manually activate Hayes. Link to comment Share on other sites More sharing options...
GlennWest Posted April 17, 2016 Author Report Share Posted April 17, 2016 Once I set I will put it out of sight. So I see no need for it. With the HDT brakes it not a big panicked deal if rv brakes fail. Link to comment Share on other sites More sharing options...
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