Checks automotive circuits with power on
Locates break in wiring and short circuits
Super clear ABS plastic housing makes seeing bulb easy
648340

For maintaining voltage continuity to engine computer, clock and radio memory when vehicle battery is disconnected
Retains radio presets, ECM codes and learned procedures up to four hours
Plugs into vehicle’s cigarette lighter outlet
Uses 9-volt battery (not included)
648539

For easy testing of wires
Inductive Design
Tester lights up when electrical current is detected
648429