Jake Brake Problem

[Gregory OConnor]

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.heavydutypowertrain.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
>
>
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>
>
> 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
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> attention.
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> Thanks again.
>
>
>
> Johnny M Slone
>
> Pikeville, Ky
>
> 98 LXI
>