Outer Limits 4x4 Board

hello all, i have a 94mdl hilux sr5, it has electronic 4x4 selection, which wont select 4x4, when you push the button you hear the little motor on the transfer case running but doesnt select 4x4, what i would like to know, is there a common fault either in this little motor or some other possible cause, and does anyone no what that little motor is called.
any help would be great thanks

It's called a shift motor. They can get water and dirt inside and sometimes corrode. Have a search on the Surf Site for more info. Never pilled one apart myself.

Nev

thanks nev i had another look tonight i think that part is working , the front tail shaft is spinning but no drive at the front wheels, i think this means the auto hubs arnt locking(i think dont no alot) so i might start looking at them

don't they have a vacumme or electronic selector on the diff maybe look there or if it's eletric look at fuses KISS principal
Keep
It
Simple
Stupid
Saves alot of time most of the time