CAT C15 MXS Jake problem

also , saw a guy on youtube explaining how to trobleshoot the jakes and he said that if there is no code for jakes it means the ECM does not get the signal to kick it and the problem would most likely be between the pedal and ECM

 

Thanks buddy , I'll try this and see how it works as I'm really pissed off after going down the I80 hill before SLC without jakes , that was something ... I'll throw them on and I'll let you know how it works , thank you again

 

called the Peterbilt dealer yesterday to find out that switches are $92 a piece (I mean ... really ?)
anyway I couldn't make it yesterday as they already closed ... will put the spare ones on today to see what happens .
Also checked the batteries and cable terminals for corrosion , cleaned really well but the issue is still there

 

Also I've put a winterfront on to see if it helps - nothing .

 

I was wondering , if the brake or clutch switch does not function properly , will it show any codes on the ET or I have to visually inspect them ?

 

It seems like my wife is not the only one that doesn't like the idea of me being otr in winter , the truck doesn't like it too .
I'll check it out today but I'm sure it might be something wrong with it because it's 40F right now and it works fine till I hit a pothole and it stops .