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Old 04-18-2019, 11:57 AM   #1
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Monaco Windsor- No Electric to Allison Trany

Gmorn from BC, Canada--hooking up my start battery wrong, I lost power forward for start and trany. Was able to replace fuses and reclaim ign start but no power to trany shift control. Have chased elect to forward elect compart and 2 red wires ? coming from main trany power forward lead(large red from rear elect compartment). I have no idea how trany gets power-- through ign switch, from rear of coach, through ign selenoid-- where. I have been without the use of my second home for 8 months. It is in a rural locale and unable to move for service. Help would be much appreciated-- doranj
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Old 04-18-2019, 01:00 PM   #2
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Hello
Dorjan
I have 4 red and red pink wires running from + DC post.
2 to the engine , fuelshut off and engine computer.

2 foreward to the dash and allison computer.
The Allison computer talks to the engine.

You have 4, 10 amp fuses close to the battery then about 18 to 24 inches from the fuse is a fuse wire end conection.
Find the crimped conection either in the fuse box or right behind.
Make certain that the crimp is good and that there is voltage on the engine and transmission computer side.

Good luck.
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Old 04-18-2019, 05:09 PM   #3
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no power to trany

thanks for the info. I do not know where to look for the allison computer. I have power to engine start and forward panel but have no idea where allison computer is located- front or rear- and what it looks like. help is much appreciated--doranj
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Old 04-18-2019, 07:08 PM   #4
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Are you saying that after working on the battery that now the tranny shift
panel will not light up ?

The trans and engine ECMs do not power thru the ignition sw they are powered all
the time . This is so they can maintain their memory .
The power is taken from the positive of the start battery . This wire / wires usually
have an in line fuse near the battery Unfortunately the fuses are sometime hard to
locate may even be wrapped up in tape . in addition to that the wire also has
butt connectors known to lose contact .
If you can locate the wire coming from the battery try tracing it .

Ray
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Old 04-23-2019, 04:32 PM   #5
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https://www.amazon.com/ACDelco-24256...61431180&psc=1

This is not your ECM but just an example.

Look inside your compartment below the driver outside. The ECM is probably within 6 feet of the transmission shifter panel. I am no expert here. I had to replace mine and that is why I know where it is.

In worst case you can pull the shifter panel out or however you can get to the wires and try to find any leads that might be the power supply wire.

Using a signal tracer you can inject a tone and then use a sniffer to chase down those illusive wires and fuses.

IF you have a fuse panel below the driver in the outside compartment look very close at those fuses. I prefer to use a test light to touch each side of the fuses.
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Old 04-23-2019, 05:55 PM   #6
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Quote:
Originally Posted by doranj View Post
thanks for the info. I do not know where to look for the allison computer. I have power to engine start and forward panel but have no idea where allison computer is located- front or rear- and what it looks like. help is much appreciated--doranj
My transmission computer is right under my shifter pad behind the panel next to my seat.
Make certain that you found and connected all red and red pink wires from your Hot post on battery with 10 amp fuse holders.
I have 4 such wires.
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Old 04-26-2019, 05:47 PM   #7
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thanks all- was able to find allison box through your input--for anyone who may need access to this controller, it is placed on the sidewall under the left side of the dash, near ones left foot when driving
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Old 04-27-2019, 11:59 AM   #8
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Sorry I can't help with that! Just noticed that you are kinda new on IRV2 and wanted to say hello! Have fun and keep her between the ditches!

Good luck, happy trails, and God bless!
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