Yes 4wd system can be an issue on those but as long as you fit new original!!!!! switches to the transfer box all will be good . They had bad switches for a while but the new ones are bomb proof.

 

Thanks, fitted new switches (all 3, only 2 were u/s, but thought id do them all) genuine ones but off ebay, tested first. Still have the same fault aaaaarrrrhhhh. Not sure what to check next, have read many posts on here, but no idea how to get any possible fault codes (will read more when i get a few moments).
Any advice what to check next?