allison problem in 06 f-650

[atetruckrepair]

hey guys i got a f-650 with a 2000 series allison i shift this into reverse and it puts it into range inhibited and check trans but when this happens i lose all data and voltage and because of this no codes anyone seen this situation happen before i checked the harness quick and found no problem and i also already changed the range selector before i realized i was losing all the data any help would be greatly appreciated Thank's Bill :help:

[talmadge]

I would back probe the power harness pos the then neg to make sure it was not losing power when goes into reverse , maybe the twisting of the frame has something to do with it.

[atetruckrepair]

I would back probe the power harness pos the then neg to make sure it was not losing power when goes into reverse , maybe the twisting of the frame has something to do with it.


do you have a schematic?

[mrhemi]

The wiring schematics are on the Allison Doc disk.

[atetruckrepair]

The wiring schematics are on the Allison Doc disk.


thank's rswire found them in appendix d for me

[atetruckrepair]

problem solved someone pierced the tcm power supply with test light it turned green cut it out now it's brand new