My 94 ford ranger got locked in 4 low after I pushed the button on the dash to lock it in now it will not come out of 4low . I have replaced the button on the dash , and I have replaced the motor on the transfer case , and tested the module by unplugging it and for the light to blink 4 times I took the motor off and changed the t case to. 2 wheel drive so I can drive it for now , but have no idea after checking all 3 parts why it won't which into 4 wheel drive now , I checked numbed 7 fuse under the hood and under the dash both good ,,, I'm lost can you help .. Thanks