Volvo vnl Multiple ecm's problems out of nowhere

Just did, i checked them out with ohmmeter I have sound out of all green yellow and white wires, one set has green yellow and white wires going in to the black jacket, and other green yellow alone going into the back jacket.

 

Hi Ben. Yes I did that, and to be honest with you i totally forgot about it that something was going on with voltage, it wasn't like it should be, I'll recheck tomorrow in the morning . Thank you for reminding that to me. Thanks Andy

 

I sure will, thank you sir. Andy

 

Hello again. Ok here is what I came up with.
With everything connected, key off position
Between pins C D 34.4 34.3 34.2 ohms fluctuates
Again key off position 1 resistor removed by the engine 66.4 66.3 66.2 ohms again fluctuates
Key off battery disconnected everything else connected 59.7 ohms
Key off battery connected ,that little plug black wires on one end of the plug green yellow wires on other plug disconnected 59.4 ohms + -1ohm

Voltage readings:
Key on position everything connected
C A pins = 0.02 volts
D A pins = 0.06 volts
Key on position that same wire disconnected
C A pins =2.54 - 2.57 volts
D A pins =2.36 - 2.38 volts
I believe that wire that I'm disconnecting is for brake ecu. Not sure 100 percent. Any suggestions on this. Thanks Andy

 

Brake ECU disconnected still same voltage in the zeros. 0.04 or so, but if I disconnected shifter it would be 2.55- 2.56 volts on pins C A

 

Hello Ben.
With all wiring intact dash information showing
Engine ecu, brake ecu,light control module, vehicle ECU and codes shown are:
Engine ecu
Mid128 sid231 fmi9
Mid128 pid84 fmi2
Trans ecu (sometimes active sometimesinactive)
Mid130 sid231 fmi2
Brake ECU
Mid136 sid231 fmi6
Mid136 sid231 fmi6
Vehicle ECU
Mid144 sid231 fmi2
Mid144 pid84 fmi2
Mid144 psid200 fmi9
Mid144 psid205 fmi9

With that green yellow wires disconnect at the batt. box codes are
Engine ecu
Mid128 pid84 fmi2
Trans ecu again sometimes active sometimesinactive
Mid130 sid231 fmi2
Vehicle ecu
Mid144 pid84 fmi2
Mid144 psid205 fmi9
I believe if I disconnect the shifter it's the same as I would disconnect that wire by battery box.