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A35c - transmission - eletric problem

GuzBR123

Member
Joined
Apr 14, 2022
Messages
14
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.
 

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sfrs4

Senior Member
Joined
Jul 22, 2013
Messages
677
Location
Great Britian
Occupation
parts admin
What's the serial number of your truck? so I can try to get the right wiring diagram.
 

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,450
Location
Will county Illinois
Occupation
Mechanic
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.
 

sfrs4

Senior Member
Joined
Jul 22, 2013
Messages
677
Location
Great Britian
Occupation
parts admin
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
 

Attachments

  • A35C transmission sensor location.pdf
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  • A35C trans wiring.pdf
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GuzBR123

Member
Joined
Apr 14, 2022
Messages
14
Location
Brasil
Hi, does anyone know how to inform the pinout on the round connector of the transmission. Ex: which solenoids are triggered by the lettersIMG-20230505-WA0020.jpg
 

sfrs4

Senior Member
Joined
Jul 22, 2013
Messages
677
Location
Great Britian
Occupation
parts admin
where is that from? the attached is the wiring diagram for the correct A35C serial number range wiring, and none of that ties in with what you have there, the pins on the A and B plug start at 1to 7 on the left hand side 1 being the top with the rounded plug end, down to 7 on the flat bottom then 8 - 14 down the right side 8 at the rounded top 14 at the flat bottom
 

Attachments

  • A35C pt1761 trans wiring.pdf
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