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  1. Suprman

    1998 M1078 A0 Wiring nightmare?

    The 2-3 shift is normally like that. If you really rev the snot out of it, then it’s a little better.
  2. Suprman

    1998 M1078 A0 Wiring nightmare?

    Ok. I was wondering how it ran that way.
  3. Suprman

    1998 M1078 A0 Wiring nightmare?

    Those batteries are not hooked up correctly.
  4. Suprman

    1998 M1078 A0 Wiring nightmare?

    There are relays in the vim module that can prevent crank. If you turn the dash switch on and the trans control comes on, and you have power to the fuel solenoid, then go to the drivers frame rail and jump the aux solenoid to crank.
  5. Suprman

    1998 M1078 A0 Wiring nightmare?

    I would just go with the wtec2 stuff and see what happens.
  6. Suprman

    1998 M1078 A0 Wiring nightmare?

    I had sold the one pictured. I do have another harness though. Strange that your 98 is wtec2. Anything can happen though. I believe the tm states the serial number where production changed to the next gen.
  7. Suprman

    1998 M1078 A0 Wiring nightmare?

    I have a wtec2 trans harness to cab pass thru like in the pic with the vim. Dont have any vims right now. Maybe mv555 does. Thats actually my pic.
  8. Suprman

    1998 M1078 A0 Wiring nightmare?

    Before you go any further. I would get the serial off the transmission, call allison and verify what gen control it is. 1998s were usually wtec3. So your wtec2 controller may not work.
  9. Suprman

    1998 M1078 A0 Wiring nightmare?

    Plenty of replacement setups out there. Make your life easier. I would not attempt to solder that mess back together unless absolutely necessary.
  10. Suprman

    1998 M1078 A0 Wiring nightmare?

    Some of the places the harness snakes thru are tight. Just make sure the big bunch wont interfere
  11. Suprman

    1998 M1078 A0 Wiring nightmare?

    The wire is pretty stiff. You can try to solder and heat shrink each one. Not alot of slack in the dash to begin with though. You might try to find some similar wire to add in and stagger the repairs so you dont have them all bunched at one spot.
  12. Suprman

    1998 M1078 A0 Wiring nightmare?

    I would go with a whole replacement dash harness/pdu
  13. Suprman

    1998 M1078 A0 Wiring nightmare?

    Upper left corner trans computer is missing. See if the cut wire goes to the bulkhead connector on the drivers side of the hump.
  14. Suprman

    1998 M1078 A0 Wiring nightmare?

    They are all md3070 trans. The wtec is just the generation of control setup.
  15. Suprman

    1998 M1078 A0 Wiring nightmare?

    First gen truck. Mechanical engine. Put fuel in the tank and pump away at the primer. Its a recirculating system but sometimes you have to crack a line at the fuel pump to bleed it a little.
  16. Suprman

    1998 M1078 A0 Wiring nightmare?

    1998 would normally be wtec3 trans control.
  17. Suprman

    1998 M1078 A0 Wiring nightmare?

    You may never know why the harness was hacked. The first gen truck dash harness and power panel is one piece. If the harness is cut it all needs to be replaced. What year is the truck?
  18. Suprman

    1998 M1078 A0 Wiring nightmare?

    First thing you need to see if the engine runs. 24v at the fuel solenoid and starter and you can crank it with a clip lead at the starter solenoid. I would check fluids and filters first.
  19. Suprman

    1998 M1078 A0 Wiring nightmare?

    The black panel is a1 c7 data bus with wtec4 or 5 keypad. Won’t work on a first gen 3116 truck or an a1 3126.
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