Let me tell you, this little gadget saved me from a weekend of frustration! The Performance Tool 3009 is my new best friend when it comes to diagnosing relay issues in my car.

The moment I unboxed it, I was impressed by its compact size - it fits perfectly in my tool bag without adding bulk. The self-contained design means no more awkwardly clamping wires to my car battery - just pop in the AA batteries and we're in business!

I've used it on multiple occasions now. One memorable time was when my truck's fuel pump suddenly stopped working. Instead of guessing (and potentially wasting money on unnecessary parts), I systematically tested each relay. The clear green/red LED indicators made it foolproof - red light meant bad relay, green meant good. Found the culprit in minutes!

The build quality feels solid - definitely not some flimsy plastic toy. It's survived several drops from my workbench with no issues (though I don't recommend testing that feature!).

Now, fair warning: It doesn't fit every single relay out there (some oddball European models gave me trouble). But for 90% of standard automotive relays? Absolute perfection.

Pro tip: Keep spare AA batteries in your glove compartment with this tester. Nothing worse than being ready to diagnose an issue and realizing your tester is dead!