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Topic: Coach won't start (Read 1782 times) previous topic - next topic

Re: Coach won't start

Reply #25 –
A fraction of the price from John
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Coach won't start

Reply #26 –
Ok drove to Tucson got my tcm back from w w williams and have forwarded it to transmission instruments in Texas ( that's the name of the company given to me by Chuck ) hopefully will have it back by Friday maybe Saturday
Cost from them is $600 plus freight
Hopefully dodged a bullet with the help from you people on the forum
Donnie, Elaine & Harley
1995 U280 Unihome 36'
Coach Build 4680
2006 Saturn Vue
Previous coach 1998 U270 34'

Re: Coach won't start

Reply #27 –
Ok drove to Tucson got my tcm back from w w williams and have forwarded it to transmission instruments in Texas ( that's the name of the company given to me by Chuck ) hopefully will have it back by Friday maybe Saturday
Cost from them is $600 plus freight
Hopefully dodged a bullet with the help from you people on the forum
Donnie, Elaine & Harley
1995 U280 Unihome 36'
Coach Build 4680
2006 Saturn Vue
Previous coach 1998 U270 34'

Re: Coach won't start

Reply #28 –
Donnie,

When you get the TCM back, and get it reinstalled, please let us know how it works and if it has solved your starting problem.  We always like to hear "the rest of the story" to tie up threads like this.  The feedback, positive OR negative, will benefit all our members.

I believe you will be very satisfied with the work done by Transmission Instruments.  They have a excellent reputation on this Forum.

And "No", we don't get a cash kickback under the table for sending work their way.  8)
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Coach won't start

Reply #29 –
Will do hope this solves the issue I may have to install myself but I will cross that bridge later
Thanks again for your help
Donnie, Elaine & Harley
1995 U280 Unihome 36'
Coach Build 4680
2006 Saturn Vue
Previous coach 1998 U270 34'

Re: Coach won't start

Reply #30 –
Pretty easy "plug and play".
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Coach won't start

Reply #31 –
Is it possible to mix up the two plugs or are they different
I didn't take the unit out but have found where it goes looks easy
Again Brett thanks for all your help and especially the tip as to where to send for rebuild
Donnie, Elaine & Harley
1995 U280 Unihome 36'
Coach Build 4680
2006 Saturn Vue
Previous coach 1998 U270 34'

Re: Coach won't start

Reply #32 –
I always labeled the two, so can't answer your specific question.

But from Allison's website and/or a call to them, they can tell you the wire numbers that correspond to gang plug positions.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Coach won't start

Reply #33 –
Quote from: Economy Travellers –
Is it possible to mix up the two plugs or are they different...
Donnie,

As I recall, on my coach, the two plugs that inserted in the ECU (TCM) were very similar...probably identical.  So I suppose it would be possible to mix them up (reverse their positions).  However, on my coach, they were bundled together with electrical tape and nylon ties in such a way that they could only be easily inserted in one way (the correct way).  If the Allison tech that removed your TCM did not disturb the wire harness bundle (by cutting all the tape and/or ties), then you will probably find that there is only one logical way for them to plug in.  See the posts linked below for photos from my coach - your coach might be slightly different.

No start, with Allison "snake eyes" (Problem Solved)

No start, with Allison "snake eyes" (Problem Solved)
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Coach won't start

Reply #34 –
Think I found a more definitive answer to your question.

If you look at the photos in the second link (above) you will see 2 shots of the TCM plugs.  Looking closely, you will notice that one plug has a black plastic piece where the wires enter the plug.  The other plug has a white plastic piece in the same place.

On my coach, the TCM is mounted to the firewall in a horizontal position, so one wiring socket is on top, and the other is on the bottom.  On my coach, the black/white plug goes into the right (top) socket.  The all-black plug goes into the left (bottom) socket.  If the plugs on your coach also have the two different colored plastic pieces, then they very likely fit the same way.

Additional evidence:  I found a service manual online for the Allison transmissions.  It has a LOT of good info.  If you scroll down to page 6-23, you will see a diagram of the TCM and the two plugs.  The black/white plug is identified as plug A, and goes into socket A, which is the "right" socket.  The all-black plug is plug B, which goes into socket B (the "left" one).

https://f01.justanswer.com/JACUSTOMER-qz77bbnq-/5b6c3d57-2211-420a-bc75-c1cb6cf1b81d_wtec+2+troubleshootin.pdf

Hope this is helpful information.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Coach won't start

Reply #35 –
Thanks a lot when I get my Tcm back l will check and see
I have time tomorrow so I will check out the wire bundles
My unit also stews to the firewall on the driver side
I'll let you know how it works out
Mu unit won't get to John until early tomorrow
Hoping for quick turn around
Donnie, Elaine & Harley
1995 U280 Unihome 36'
Coach Build 4680
2006 Saturn Vue
Previous coach 1998 U270 34'

Re: Coach won't start

Reply #36 –
Chuck
I have had time to go thru the info you sent thanks it was a great help
My unit also screws to the firewall but vertically ( go figure)
My plugs are like yours ( white and black ) so by looking in the Allison manual l was able to figure which was A and which was B
Looks like John shud receive my unit by 10:30
Can't wait to get going
Donnie, Elaine & Harley
1995 U280 Unihome 36'
Coach Build 4680
2006 Saturn Vue
Previous coach 1998 U270 34'

Re: Coach won't start

Reply #37 –
Ok final update ( I hope ) on the faulty ecu
John and Vojta at transmission instruments were fantastic they received my ecu at 10:30 in the morning were able to rebuild and ship out that nite
I received the next evening ( Friday )
Got up this morning and followed john's instructions exactly
Disconnect battery
Clean pins with electronic cleaner
Insert the plugs at least 10 times to insure contact
When I first did it the coach started but would not go into gear and the 6 left cell on the pad was flashing John said this may happen and said to run the coach for 10 minutes then repeat the process
I did that and everything worked fine
Packed up and drove to our destination in Yuma
Thanks again to all on the forum it is a remarkable resource that we are fortunate to have
Thanks especially to chuck and Brett saved me some big $
Donnie, Elaine & Harley
1995 U280 Unihome 36'
Coach Build 4680
2006 Saturn Vue
Previous coach 1998 U270 34'

Re: Coach won't start

Reply #38 –
Happy to be of some assistance.  Hope the rest of your trip is enjoyable and trouble free.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Coach won't start

Reply #39 –
Congrats to all.  Great thread.  ^.^d
Scott & Carol Seibert
2001 42' double slide U320 - Sold
Previous - 2002 36' U320