Jake Brake Problem

[Johnny M Slone]

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