I will need my 4x4 later today and it won't engage! I bought my 07 several months ago and I've only engaged the 4x4 a couple times. I went to use it this morning and it is a "no go". When I start the truck the 4x4 dash lights do light up. When I actually try to put it in 4x4 with the truck started, no lights and no relay clicking. I checked all the fuses and relays that seem to have anything to do with the 4 wheel drive.

Please help!

 

Okay, so the Serach Function indicates this is a very common issue. I just got it to work by tapping on the transfer case with a hammer. I'll be sure to engage it every couple weeks and cross my fingers it doesn't resurface.