2000 Peterbilt 379 brake/cruise

When the brake is applied the cruise control does not cancel, I have replaced, the stop and all the pressure sensors in the manifold (pictured). I am assuming there is another switch/sensor somewhere? I have searched threads and haven't been able to find this info. Any help would be appreciated

 

Does it cancel if you pull the Johnny bar - tap the clutch - toggle cruise switch on dash?

And - do tractor brake lights activate on pedal brake push/Johnson valve?

 

Yes, the clutch will kill the cruise control. The cruise toggles work normal (,high idel, ect). The brake lights do work as normal as well. The hand brake does activate the stop lights too. But neither the foot brake or hand valve will cancel the cruise control when applied.

 

I’ve got a 1995 - the ground circuit for the cruise had been hacked into for an accessory, messed up the cruise circuit.

Unit new to you?

 

@Goodysnap @jamespmack @wore out

 

I believe this is the is the sensor. Have you checked that one of the wires are hot?

 

I replaced that one too, applied brake still doesn't kill the cruise

 

You did check the ones on both sides?

 

The engine is not seeing brake applied signal.

What engine? Has it ever worked?