When reassembling the unit make sure to separate wires. Black & white to switch on one side, black & white to load on the other side. The two green wires should be directly up the center of the cabinet. This reduces the magnetic effect to the meter. For best results, make sure the Neg cable is installed on the back side of the divider in the handle.
Century Tool & Equipment
4013 S. Old Hwy 94 St. Peters MO 63304