Electrical conditioning monitoring module for a vehicular electrical system

1. Technical Field An interface device adapted to be connected between an electrical circuit and a monitor. The invention of a common terminal, "n" number of sensing terminals, "n" number of sensing impedances, and "n" number of load terminals. Each load terminal is in electrical communication with the common terminal through a separate sensing impedance. Each sensing impedance is substantially less than the aggregate electrical circuit load side impedance between the sensing impedance and ground when the invention is connected in series between the supply side and load side of the electrical circuit. Each load terminal is substantially the same electrical point as only one sensing terminal. In one embodiment, the invention incorporates various protective elements including: a supply side electrical circuit protective element; a load side electrical circuit protective element; and a monitor circuit protective element.