Help, 4x4 has a life of its own

[Lapdance]

Gentlemen (and I'm sure Ladies)

Please help an ignorant redneck. I have a 2008 1500 Mega Cab with the 5.7.

Starting two days ago as I was walking up to my truck (it was not running) I heard an electronic noise of something clicking. It did it once or twice and then stopped. I thought it may have something to do with the power door locks. The next day as I was driving, the 'service 4wd' light popped on for a second and then disappeared. Then my 4wd light came on for a second and then disappeared. It dawned on me that the noise I heard when the truck was off was the transfer case engaging into 4wd and then back out of it. It happened again today (luckily while I was turning out of my driveway) into 4 lo. I think there has got to be a short somewhere and occasionally it arcs or something to quickly engage and then disengage the 4wd. I disconnected the actuator pigtail today to hopefully prevent my truck (who may now go by the name Christine) from going into 4wd Lo while doing 80 down the highway. I did some searching and couldn't find anything. How could the transfer case go in and out of 4wd when the truck is off?

Thanks in advance!

 

[TheMaddog]

make sure the switch is all the way on 2wd, could be loose and could be trying to switch into 4wd while youre driving

 

[Lapdance]

Yeah, thanks, that's what I thought at first. I messed with the switch back and forth while standing still, thinking there might be a short there, but when it went into 4 Lo today it really threw me for a loop.

 

[KGBIGCOUNTRY]

The multi switch could be failing

 

[Lapdance]

Forgive my ignorance. You mean the actual switch that I turn to activate the 4wd? Could there be a short on the switch end causing it to jump into 4wd and 4 Lo automatically?