My 4 wheel drive quit working the other day. I have Warn manual hubs so its not a vacuum leak or anything. You can hear the solenoid activate when you flip the switch in the cab, but no 4x4 light and no 4x4. No fuses are blown. Would a bad relay be the cause or would we be looking at a new transfercase motor? I havent checked the relays, are they under the hood to the right of the master cylinder? How can you tell if they are bad?