Looking at the Bow Thruster wiring diagram in the Files section, there are four control wires going to the Thruster Linear Actuator. Two are marked "lev" and two are marked "tem". I am guessing "lev" stands for "lever" or "raise" in english.
What does "tem" stand for?
Note that this is a 1987 drawing, so likely not representative of the current design. Does anyone have a more up to date wiring diagram of the bow thruster, especially the linear actuator?