P+ is pressure for the lumbar, P- is vacuum for HVAC. I dont know of anyone who has successfully repaired a pump for any extended period of time. I would pull the plug on the pump wait for a few moments and power up. The pump has a safety if it runs too long it diasbles it, if you cant hear the motor run ...well. The pump provides constant pressure for the lumbars, provides vaccum for the engine/AC/ when accelerating or at "rest". ZV is switched vacuum / pressure for lock and unlock, pressure to unlock, vacuum to lock. SFG is for the lid grip. You are probably hearing the relay(s), but not the motor.