Hello, i have a 91 explorer with a solid axle,so i have no hubs. but my 4H & 4L shift buttons not work. I put in a new $105.00 shift motor. but still no 4wheel drive. and it's snowing is SD help. last week i washed my truck (bad idea). thats when my 4H light came on but i was not in 4H. I got a...