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A35c - transmission - eletric problem

Discussion in 'Off Road Haul Trucks' started by GuzBR123, Jul 20, 2022.

  1. GuzBR123

    GuzBR123 Member

    Joined:
    Apr 14, 2022
    Messages:
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    Location:
    Brasil
    Good morning, I have an a35c that burned the transmission module, I am operating it in safe mode. but it only does the 2nd gear, I would like to know which of the terminals are responsible for the gear solenoids and what voltage stops them.
     

    Attached Files:

  2. sfrs4

    sfrs4 Senior Member

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    What's the serial number of your truck? so I can try to get the right wiring diagram.
     
  3. funwithfuel

    funwithfuel Senior Member

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    Mar 7, 2017
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    Occupation:
    Mechanic
    Location:
    Will county Illinois
    You know, there's not a lot of black magic and voodoo in there. That was an early (simple) ECU. Odds are someone under-protected the unit with a bigger fuse. Carefully remove the screws from both ends and the center. Slide the board out and look for a burnt trace. You can jump the burn section with telephone wire. If you don't trust your skills find an ol timer TV repairman to solder it for ya. Good luck. I also seem to recall a zener diode that would occasionally crap out as well. Again, good luck.
     
    Vetech63, Gary Layton and mg2361 like this.
  4. GuzBR123

    GuzBR123 Member

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    Location:
    Brasil
  5. sfrs4

    sfrs4 Senior Member

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    Occupation:
    parts admin
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    Hi Guz, take a look at the wiring diagram attached, unfortunately there are no voltage levels on the drawings
    The following colours are used in wiring diagrams:
    SB = Black
    R = Red
    GN = Green
    BL = Blue
    Y = Yellow
    W = White
    BN = Brown
    GR = Grey
    P = Pink
    V = Violet
    OR = Orange
     

    Attached Files:

    Vetech63 likes this.
  6. GuzBR123

    GuzBR123 Member

    Joined:
    Apr 14, 2022
    Messages:
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    Brasil
    Thanks vou very much, now íris easier