This weekend I installed my Nathan K3LA locomotive horns on the crossmember just behind the cab of my 2015 Prostar, facing backward. I ran the 1/4" air line from the electric solenoid, to a brake relay valve I have on an additional 8 gal air tank I mounted under the cab, which goes to the horn via 1/2" air line. So the horn works just like stock, but a helluva lot louder.
But when my cruise is set, and I hit the horn, my dash lights up with the triangle, abs, and traction control lights, and that combination always kills your cruise until you shut the truck off for 5 mins.
So any idea why it's doing this? I added the 3rd tank so I wouldn't drain the primary or secondary tanks, but the 3rd tank feed is directly off the air dryer, so I don't know if the sudden drop in only a few psi is causing the abs to trip up ir what? I don't run around like an ####### blowing my horn for fun either, I just want my darn cruise to work right. I'd appreciate any advice y'all can offer!
Train horns kill my cruise control!!
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by SemperFiServices, Aug 19, 2020.
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