2014 C4GP, rear parking brake to abs control wiring, pin outs

[retgar2002]

Hi guys nee here, but I have s problem with my 2014 C4GP 1.6HDI semi automatic, my problem is with the RH, parking brake, is refusing to engage, I've had an auto electrician look at it and replaced the rear caliper and parking motor, to no avail, I require if any body can be of assistance a wiring diagram and pin out from the abs/bsi unit as I suspect that it it to do with the wiring at that end thanks in advance

[retgar2002]

vin VF7**************[VIN obfuscated, can be read by forum staff] thanks