Joe.kent

The other morning, in the snow and ice, I tried to go into 4 high and nothing happened, but when I tried 4 low, it went no problem. When I start the truck, both 4 high and 4 low lighs flash on, so I know there isn't a problem there, anyone have any ideas?
I have noticed that this is occuring in the morning time, and by the time I get into my truck at lunch and try it, the light lights up and the front engages, any thoughts?Thank you in advance.