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  1. R

    M1079 no start and no display on Allison transmission

    These are the two sheets in the schematic I am referring to... You can also follow the power from PX33 J1 and J2 thru to the trans controller connector J115...
  2. R

    M1079 no start and no display on Allison transmission

    don't know what that is, is it written for the installation used in the FMTV? Got a link so we are on the same page? They use this trans in a lot of vehicles with a lot of different configurations. Unless that manual is specific for this vehicle its troubleshooting may not be applicable...
  3. R

    M1079 no start and no display on Allison transmission

    The VIM receives both 12 and 24V from CB21, 35 and 79 either directly or via Terminal Board 1. TB1 is broken into sections and is used to distribute 12 or 24V. Anytime you see TB1 it means DC power. TB2 is connected to the ground buss in the PDP so anytime you see TB2 it means ground. Where is...
  4. R

    M1079 no start and no display on Allison transmission

    Yes, batt neg to the ground tp in the PDP should be pretty low resistance. If all the lights are working and you get 12 and 24 at the test points the ground has to be there and it is probably OK The polarity box has 6 wires connected to its 4 terminals. 2 from the battery, 2 from the alt and 2...
  5. R

    M1079 no start and no display on Allison transmission

    Behind the passenger kickpanel you will either have a VIM(wtec2) or the trans controller(wtec3). Since you are using the acronym vim, And it has fuses inside I would say you have a wtec2. if you have power thru those fuses then you either have a bad connection to the trans controller under the...
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