Volvo vnl Multiple ecm's problems out of nowhere

Andy each Mid should generate is own Data and data voltage. Connect the module and identify which pins are data circuit. Remove those wires in plug and check data voltage on the back of the key pad module. Note when the module is energise and data lines not connected to the circuit the data voltage is higher than normal based on my back ground

 

This is back of the controller. Red dots are where one set of green/yellow wires go. If I put my ohm meter on those two pins it reads 119.9 but has no sound. If I put tester on other two pins also green/yellow wire pins I get nothing at all . I'll put picture below with multimeter readings.

 

That's one set green/yellow wires pins reading with controler completely removed from truck.

 

Other set green/yellow wires pins on same controller.

 

These two pins has nothing

 

More testing. Yellow dots = yellow wires on back controller
Green dots = green wires
White dot =white wire shield
Red dots = where yellow wire also has continuity with black wires not sure if its supposed to be like that

 

Andy i will have a controller in my hands tonight. Then i will be able to compare the reading value yours and mine. What is the part number of your original controller ?

 

Customer pn 20413571
Eaton pn 5574611
Assy serial# m74yy
Initial app. Software 5569800
Ecu pn: s-2877
Serial number m74yy
Hardware rev: A-7466 b
Model:EPB2000A06
Download key: m74yy98001808
I got all numbers of the one I have, not sure which one's you would need. Thank you Ben for your help.

 

I will back in 2hrs from now