I have the push button 4wd system on an 04' TRD V6 doublecab with the automatic transmission. When the button is pushed, I still hear the click of the switch, but the indicator light doesn't come on and the front wheels aren't powered. However, I can shift the lever into 4wd low and the rear diff lock will engage. My truck has 120,000 on it and a sizeable portion of that with 4wd engaged in the snow and in baja. I first noticed the problem last Christmas in baja but was able to get the system engaged by turning the system on and off while accelerating, braking and reversing. When it does turn on/engage, there's is no difference in the sound of the system as the button is pushed. Later in Mammoth, I tried the same routines, but it only came on after driving 5 or so miles. Any ideas? I tried a search but didn't see a thread with my equipment or specific problems. thanks for the help!