A quick question. On my explorer I have the electronic shifting dial. When I teun it to 4x4 nothing happens, after awhile the hi and low 4x4 lights flash. Now if I stop and put truck in neutral the turn it to low it works, also from there if I change it to just 4x4 it also works. Now if I turn it off it will not come back on again. Is this a major problem cost wise or just a bad switch. Any ideas? Thanks AL Sproule