Jake Brake Problem

[Pete Masterson]

I have the re-wired jake brake on my coach. The 'medium' setting is
wired out. Only "low" and "high" operate.

When I had my muffler replaced (earlier this year) the first thing I
noticed is that the Jake brake is barely audible (before it was
pretty obvious -- but I, in essence, had no muffler). I also notice
that with the jake passing through the muffler, it's much less
effective than it was when the muffler was mostly a joke. That may be
part of your situation.

While passing through Texas, I entered many towns that had "no Jake
Brake" ordinances, so I was turning the system on and off. I noticed
that it seemed to work intermittently. Dunno if I turned it off while
it was operating or not. It seems to be working ok now....

Pete Masterson
'95 Blue Bird Wanderlodge WBDA 42
aeonix1@...
On the road at Dalton, PA



On Sep 17, 2008, at 12:02 PM, Kurt Horvath wrote:

> 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 #23 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.
> 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.
>
> Kurt Horvath
> 95 PT-42
> 10AC
>>
>> 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
>>>
>>
>
>
>
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