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My gauge is jumping around before settling in the correct position. Why?

This is caused by low battery voltage. When the hydraulic actuator is first turned on, the motor inrush current pulls the battery voltage down. If the voltage is sufficiently low, this will cause a momentary brown-out to the linear position sensor.  This will cause the needle to “jump” if it goes low enough. Please ensure that the battery voltage is higher than 10.5 V when the engine is not running.