Well, whether you use 4x4 or not but imo all the systems should be in working conditions. If you can't find the wiring, try to find electrician who can build the wiring.
PS: I just checked with an electrician Rehman. He said he has the wiring diagrams for this cruiser and can build the wiring from scratch. Just go and have a checkup.
Rehman Electrician
03214038543
Walton Road, After Toyota Cantt 3S.