I thought I had it all figured out. Last winter my 4X4 took a dump on me. I followed the directions from this post and was able to fix it with replacing the solenoid on the firewall with the new one with the rainguard. It worked perfectly for a few months. Recently I started having problems getting it to engage and now it will not engage at all. When front is jacked off the ground and engine off the the hubs will engage and with the engine started they disengauge as they should. When I switch to 4X4 hi or lo the light comes on but no 4X4. Could the new solenoid be defective? or is there something else I should look at. Thanks for any help ya'll might be able to give.