My 4WD will not activate in 4L. 4H is fine, but when I switch to 4L, it just goes back into 2WD and the 4L light doesn't even light up. Has anyone had this problem? Is it possible that it is a problem with the switch, or something electrical?

2004 F-150 FX4 Supercrew

 

Are you putting it in Neutral before you try and put it in to 4Low

 

no

 

Theres the problem then

 

I was unaware of that. This is my first "on the fly" 4WD. The last one I had was a '77 land cruiser with locking hubs.

 

yea the same thing happened to me when i bought my truck ha

 

I appreciate your help!

 

to shift into 4lo you stop, put the truck in neutral, shift into 4lo and wait for it to activate, then switch shift back into drive . the reverse process is required to shift out of 4lo

 

Thats the important part. 4lo is not on the fly like 4 hi, you must be stopped and switched into nuetral.

 

And you must have your foot on the brake!