... 54°±2°♦ Function descriptiona. Its control is available when the electricity is low; “+”should be connected to +12V, ... and“-”should be connected to the ground.b. The rotating arm would stop at a, b, c ... , d, and e when the electric signal is separately linked to A, B, C, ... and E.The stroke of rotating arm is “a ↔e” and it could stop at any position. Used in Pickup Airconditioning ...