I'm new to the toyota world, and am looking to purchase an 88' wagon with an automatic. It's under 200k, and the only thing making me think twice about the purchase is that while test driving the truck, the 4wd indicator light was on, yet the 4wd button wasn't pressed. The truck didn't seem to be engaged, but I didn't lock the hubs to check for sure either. Should this be a worry if I'm to buy, or is it as simple as replacing the switch? Any other issues with the auto I should worry about? Thank you all for your help.