99 Expedition, 4x4 select does not work

TonyB · 02-25-2007, 04:29 PM

When I turn the select knob for either 4Hi or 4x4 low it has no effect. The dashboard indicators do not lightup when 4x4 is selected ( they work when key is turned on) and vehicle does not go into 4x4 operation. Checked fuse...it's okay. Code reader does not come up with any codes.
Does anyone have any idea what to check next? Thanks!

goon · 02-25-2007, 06:01 PM

when your switching from high to low you must have the vehicle running in neutral and your foot on the brake before it will go into low also to take the transfercase out of low you must do the same step.

Pedro · 02-26-2007, 10:44 PM

I had this problem about 3 weeks ago... everything begun with a funny noice from the transfer.... then the 4X4 was full time working and some times will change to LO but never to A4WD...... i had to change the transfer........

But first you should check the Shift Motor.......

TonyB · 02-27-2007, 07:12 PM

Quote:

Originally Posted by goon

when your switching from high to low you must have the vehicle running in neutral and your foot on the brake before it will go into low also to take the transfercase out of low you must do the same step.

Thanks, Tried that...no luck. Is there a relay I should check?

TonyB · 02-27-2007, 07:14 PM

Thanks...tried that. Switch ha no effect to select 4 hi or low. Is there a relay?

TonyB · 02-27-2007, 07:15 PM

Thanks, I'll check the shift motor.