04 Grizzly 660 4×4 Stuck in Differential lock

Hey guys, new to grizzly central and needing some help. My husband and I have resurrected our grizzly from the dead lol. we bought it used and have been working on it as time and money have allowed. Long story short… we bought a new servo motor and just installed it and NOTHING is happening. The bike is stuck in differential lock. we are trying to trouble shoot but not having much luck. Anybody ever have this problem or have any suggestions? Would like to find electrical diagram if possible. Any help is greatly appreciated.