My 02' , 7.3dsl 4x4 will not engauge will the selector on the dash. It will go into 4x4 if you lock in the hubs. Is this a fuse or something simple. Thanks.
hes got a vacuum leak !
the ESOF hubs are enguage by the vac. pump
(mins on the pass. side fender)...check the lines &
their connections...replace as needed.
hows his ac/heat working ? its my understanding the
same pump is used to switch between dash/floor & defrost etc.