165812V Computer-safe Circuit Tester with LED Polarity Indicator


Checks open or short circuits on 12V automotive computer circuits and all primary automotive electrical circuits. Safely tests standard primary automotive circuits and on-board computer controlled electrical system without damaging the micro-processor.


  • With CE Approval.
  • 48-inch cable with insulated alligator clip.
  • Probe length: Approximately 70mm / 2.75"
  • Tough plastic handle lights up when circuit is in good condition.


VOLTAGE Check on 12V systems
PROBE LENGTH 70 mm / 2.75"
  1. Turn power "ON" to circuit being tested.
  2. Fasten alligator clip to good ground.
  3. Pierce wire with probe if bulb glows, circuit is complete.
  4. Repeat above procedure to test following wire, until bulb fails to glow, repairs accordingly.