Went out for a ride in sand hills on Saturday . worked fine for about a hr.everthing was shifting like normal. Then for some rason the power steering light came on and so did the engine light . It showed gear 1 on the indicator which was flashing. and wouln't shift out of first gear. I shut if off checked for loose battery cables everything seemed tight. Started up and it worked normal for less then 1/8 of a mile. Shut it off again this time tried tightening the cables .After start up worked good for a very short time then same thing. I did this for 4 times and finally because we were only a mile from the truck decided to drive back and load up. So when this happens it just has the power steering light on and the engine light is on steady plus the the number 1 just flashes steady . What should I be looking for. Thanks