service 4wd

Hey Ram Fans, My truck is nearing the 100k miles mark and I was wondering if anyone here had any idea of what a tune-up would consist of and if anyone has done the tune-up themselves. Would like to save me some money by not going to the dealer to get this done?:smileup:Any pointers and advice...

Long story short I was wiring something up and a made a mistake. I tapped into a pink with green stripe wire under the steering column and now my service 4x4 light and my traction control lights its are on. The truck runs fine other than the fact I can not switch it into 4x4. Does anyone have...