Jake Brake Problem

[Gregory OConnor]

I replace all three and opened up the hermetic seal. they were all
full of rust, (not nearly as good a seal as Ed McMahon's mayonnaise
jar). I think they are put at the bumper to keep the heat away???? I
added one more source to power the front ign switch and learned
that all the running lights and most every thing is powered off the
house batteries. if you turn off the house batteries and unplug the
chargers, all you have is starter, ignition and computer. I found
only one fuse under the front panel that was powered off the
batteries hot all the time, 10 ga wire, red, BAK3. I added one more
15 amp off this to the ign. I wonder if that will let the rear 20
amp and the newfront 15 amp burn 35 amp to the ignition switch?????
likewies, the two 20 amps at the rear giving the computer 40 amps
prior to trip off????
greg

--- In WanderlodgeForum@yahoogroups.com, "Gregory OConnor"
wrote:
>
>
> My prints say the two to the right go to a "Power Harness
Connector" one
> other wire to that same P H connector is from the coolant level
sensor
> so my thinking is it was the power to the DDec???
> a View full size
> <http://pictures.aol.com/ap/singleImage.do?
pid=9120PCTTwcnwYsmgQfB1MFCZ8\
> VkyhYjbO8s2v4xQp5Fd3Ig%3D> b
> greg
> --- In WanderlodgeForum@yahoogroups.com, Leroy Eckert
> wrote:
> >
> > Don't know Greg. I know they are in the engine compartment but
have
> never tracked them down..I have several auto reset breakers back
there.
> I also know my Royale is different than others. Maybe those Prevost
> converters knew something.?????
> > Leroy Eckert
> > 1990 WB-40 Smoke N Mirrors
> > Royale Conversion
> >
> > --- On Thu, 9/18/08, Gregory OConnor Gregoryoc@ wrote:
> > From: Gregory OConnor Gregoryoc@
> > Subject: [WanderlodgeForum] Re: Jake Brake Problem
> > To: WanderlodgeForum@yahoogroups.com
> > Date: Thursday, September 18, 2008, 12:55 AM
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > If its a prob with the computer this guy has the answer. he
lists a
> >
> > land line. lot of good info on his site. I sent him several
> >
> > computers to reprogram
> >
> > http://www.heavydut ypowertrain. com/detroitecms. htm
> >
> >
> >
> > I wonder if the two power sources for the ddec are the right two
> >
> > fuse/breakers behind the rear bumper?? the left is the ign switch
> >
> > and bulk oil switch
> >
> >
> >
> > greg
> >
> >
> >
> > --- In WanderlodgeForum@ yahoogroups. com, Leroy Eckert
> >
> > wrote:
> >
> > >
> >
> > > One other thing I forgot. It has been a year since I studied my
> >
> > set up so I am going from memory. I specifically remember that my
> >
> > coach has two main DDEC power sources spliced somewhere near the
> >
> > DDEC control unit and two separate grounds. This set up
presumably
> >
> > as a fail safe in case one of two fuses or relays on the power
side
> >
> > malfunctions, and/or a bad ground in one location either of
which
> >
> > prevents an engine shut down because the DDEC cannot think.(no
> >
> > power, no ground) I do not know if BB did this or Royale when
they
> >
> > converted my coach. Hope this helps.
> >
> > > Leroy Eckert
> >
> > > 1990 WB-40 Smoke N Mirrors
> >
> > > Dahlonega, GA
> >
> > > Royale Conversion
> >
> > >
> >
> > > --- On Wed, 9/17/08, Johnny M Slone wrote:
> >
> > > From: Johnny M Slone
> >
> > > Subject: [WanderlodgeForum] Re: Jake Brake Problem
> >
> > > To: WanderlodgeForum@ yahoogroups. com
> >
> > > Date: Wednesday, September 17, 2008, 10:07 PM
> >
> > >
> >
> > >
> >
> > >
> >
> > >
> >
> > >
> >
> > >
> >
> > >
> >
> > >
> >
> > >
> >
> > >
> >
> > >
> >
> > > Thanks for the replies. I have been searching for a
> >
> > schematic that
> >
> > >
> >
> > > shows how the Allison WTEC and DDEC III are wired and what
should
> >
> > be
> >
> > >
> >
> > > on each lead. I have a BB drawing that shows the control
switches
> >
> > and
> >
> > >
> >
> > > relays. I have tested as best I could these circuits and I'm
> >
> > >
> >
> > > satisfied that this part is doig what it should. There appears
to
> >
> > be
> >
> > >
> >
> > > a lead
> >
> > >
> >
> > > (engine brake enable) from the WTEC to a VIM. I suspect this
is a
> >
> > >
> >
> > > relay. This enable lead opens when all conditions are satisfied
> >
> > for
> >
> > >
> >
> > > the jake to work. This circuit contols the engine brake disable
> >
> > lead
> >
> > >
> >
> > > to the DDEC III. Is anyone familiar with this circuit and know
> >
> > where
> >
> > >
> >
> > > to look for it. I may be on a wild goose chase.
> >
> > >
> >
> > >
> >
> > >
> >
> > > When the jake brake is working its not real loud inside the
coach.
> >
> > >
> >
> > > Here in the mountians you definately know when it isn't. Going
> >
> > down a
> >
> > >
> >
> > > 6% grade for about a mile without a jake or a retarder will get
> >
> > your
> >
> > >
> >
> > > attention.
> >
> > >
> >
> > >
> >
> > >
> >
> > > Thanks again.
> >
> > >
> >
> > >
> >
> > >
> >
> > > Johnny M Slone
> >
> > >
> >
> > > Pikeville, Ky
> >
> > >
> >
> > > 98 LXI
> >
> > >
> >
>