Digital Circuit Tester Pen — 5–90V Test Probe

Find the dead circuit without guessing.

Blown fuse, dead marker light, a trailer plug that won't talk — touch the probe and the digital readout shows you exactly where power stops. Covers 6V, 12V, and 24V systems, so it works on the tractor and the trailer both. Sharp tip bites through insulation when you need it to.

A small problem you solve in the cab instead of paying shop time to chase it down.

Power or no power — now you know.

Orders typically process within 1-3 business days. Standard shipping ranges from 7-15 business days depending on your location and product. Tracking is provided via email once your order ships. Free shipping on orders over $50.