Discontinued See 9101 for a comparable unit or 9004A for an upgraded version.
9003A Innovative Products Mini MUTT Trailer Light Tester - Analog trailer tester for lights and ABS functions on light duty trailers 7 spade, 6, round, and 4/5 pin harnesses. The Mini MUTT® places a load on the trailer’s electrical circuits to verify proper lighting function.

Built to facilitate a one-man testing operation, the Mini MUTT® reduces guesswork and inspection time to prevent failures that lead to expensive road calls and citations.

The Mini MUTT® requires an internal 12V DC battery or external DC power source for operation.

The internal battery can be purchased separately or directly from a battery distributor.