I havent been working on my brakes in awhile but not thinking anything about it i was looking at the brake lines coming out of the master cylinder and saw the the front part had 2 lines coming out, 1 to the valve and another through the firewall? i didnt think this was normal? could this be causing me problems? The pic is kind of hard to see but if you look you can.

 

It goes to a hydraulic trailer brake controller mounted under the dash, it taps into your master cylinder and senses the amount of brake pressure applied.

 

Yep, old school. Had one like it on a 76 hi-boy set up.

 

So if im not using the trailer brakes for anything can i just not use that line and and mount the 2 new lines straight to the valve?

 

That is what I am doing. For what that is worth. lol