PERFECT INEXPENSIVE LITTLE TOOL COMMONLY USED FOR TESTING AND CONFIRMING A WIRE'S POLARITY IN A VEHICLE WHEN INSTALLING CAR ALARMS AND REMOTE STARTER SYSTEMS or CHECKING ANY WIRES 12V ANALOG POLARITY IN A VEHICLE.
SIMPLE OPERATION
HOW IT WORKS:
CONNECT THE ALLIGATOR CLIP TO A CHASSIS GROUND WHEN PROBING FOR A (+) POSITIVE POLARITY: RED LED LIGHTS
CONNECT THE ALLIGATOR CLIP TO A +12VDC (POSITIVE) WHEN PROBING FOR A (-) NEGATIVE POLARITY: GREEN LED LIGHTS (SOME MODELS WILL LIGHT BLUE INSTEAD)