Changed my 4x4 control module today i now have dash lights when starting for 4wd but when i turn dash switch to 4wLO the light doesn't come on and doesn't change to LO.
Does anyone have an idea what problem could be.

 

after i switched mine i have to get it in neutral push in the clutch let off push the brake lol . i just have to do that and mess with it until it decides it wants to switch . or even just put it back in 4hi and roll forward a little then try it again

 

Put the truck in neutral push in the clutch and push in the brake. Should go into 4 low.