Protecting sensitive electronic components during diagnostic work, this circuit tester operates across a 3 to 28 V range without damaging automotive computers. It draws less than 21 mA at 12 V DC and identifies polarity via color-coded indicators, with a red light for positive and a green light for negative.

Protecting sensitive electronic components during diagnostic work, this circuit tester operates across a 3 to 28 V range without damaging automotive computers. It draws less than 21 mA at 12 V DC and identifies polarity via color-coded indicators, with a red light for positive and a green light for negative.