Jake Brake Problem

[Kurt Horvath]

Seems like every other posting of a problem I've got it! Or had it.
Will get it! Bus hypochondria?
Tested the switches, they have continuity, the tranny down shifts but
no Jake.
I had it checked by D.D. over 18 months ago. They found my problem.
Ended up getting a new cam and roller bearings on #6 cyl. I was told
everything's working.
My BB guru informs me if it's working you'll know it. It's AUDIBLE!
Well mine doesn't have any noticeable sound change, or anything like
on the big rigs. Also in the 95's there is known problem with the
Jake
I was told to check the panel up front for a relay that should be
disconnected or by-passed #22 C. If it's already done and the
transmission is downshifting the DDEC is either not functioning
correctly or the Jake has been disabled in the DDEC computer. My
relay has already been removed.
In my infinite wisdom, read in here paranoia. I have a spare DDEC
unit in my toolbox that has been programmed to my engine. If I can
I'll have it double checked for it's programming to make sure the
Jake is enabled. I'll get it put in the next few weeks and let you
guys know what happens.

10AC
Kurt Horvath
95 PT-42


--- In WanderlodgeForum@yahoogroups.com, "coreyg67" wrote:
>
> Johnny,
>
> I believe I am experiencing the exact same problem intermittenly.
> The only time mine appears to do so is if I turn off the brake
using
> the switch while it is active. Typically once this is done, it
will
> not come back on until I shut the engine down. But mine acts
> exactly the same. when it quits working, the tranny will still
> downshift as if in braking mode, but the engine never actually
> switches to brake mode.
>
> Eric,
>
> when switch failure occurs as you mention, was the tranny still
> downshifting to accomodate the brake? I would think if it was
> switch failure, the entire system would be inactive. I hope it is
> as easy as that, but I'm afraid not.
>
> Corey and Jenni Graham
> 1996 PT42 60series
> Prosper, TX
>
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Johnny M Slone"
> wrote:
> >
> > Hello,
> > I'm having a problem with the jake brake on my 98 LXI. It will
> work
> > fine for a while and then just stop working. The trans will down
> shift
> > but the jakes will not work. At first I thought the cruise was
> > disabeling it but I tried using it withoout the cruise and it
> stops
> > working after the motor get real hot. Seems as though I can shut
> the
> > engine off for a while and it will work again for a while.
> > Has anyone had a similiar problem. How do I chase the problem.
I'm
> not
> > real sure I know where all the parts are.
> > Thanks,
> > Johnny M Slone
> > Pikeville, Ky
> > 98 LXI
> >
>