This Lisle 28400 is a no-nonsense, classic tool that every DIY mechanic or car owner should have. It's a simple 12-volt circuit tester. You've got a probe on one end and an alligator clip on the other. Clip the ground to a known good ground, touch the probe to the circuit you're checking, and if there's power, the bulb lights up. It's that easy. It's perfect for checking fuses, tracing wiring problems, testing sockets, or figuring out if a switch is working. This one is built to last with a heavy-duty design and a strain relief spring on the cord to prevent breakage where it enters the handle. It's a bulb-type tester, so it's super straightforward—no batteries or complicated electronics. It tests low-voltage circuits up to 12 volts, which covers pretty much everything in your car, truck, motorcycle, or boat. An essential, reliable tool for your garage that will save you time and frustration. Keep one in your toolbox!
