P0500 code

[kiwi1950]

Hello all. New to this forum.
I have a 98 V90 that's showing the P0500 code. VSS A.

I have checked and cleaned the front sensors. They are showing voltage when I spin the wheel. I can reset the codes and everything works for a short time. The speedo will work some times and the transmission shifts properly when the code is absent. I have read on line the ABS module can be a problem. I have another module on the way. My question is does anyone have the pinout for the module to sheck the rear VSS at the module.
Any help is appreciated.
Cheers.