Diagnoses Blown Fuses, Dead Relays & Bad Wiring In Seconds
#1
BESTSELLER OF 2026
Find Any Car Electrical Problem In Seconds
TryEverlyn's SmartProbe Car Tester
Replaces Your Multimeter, Test Light & Relay Tester
Built-In LED Spotlight Lights Up Any Dark Engine Bay
60-Day Money Back Guarantee
Daniel P.
I used to carry a multimeter, a test light, and a separate relay tester in my toolbox and this replaced all three. Plugged a relay straight into the socket, hit test, and knew it was bad in two seconds flat. The built-in light alone has saved me so much squinting under the dash at night.
SmartProbe Car Tester
"Replaced My Whole Toolbox"
I used to carry a multimeter, a test light, and a separate relay tester. This one tool does all three and it lives in my glovebox now.
"Found My Blown Relay In Seconds"
Plugged it in, hit test, saw the red light. Would have taken me twenty minutes with a multimeter to figure that out.
"No More Guessing On Fuses"
Touched the probe to both sides of the fuse and could instantly see which one was blown. So much faster than pulling them all out one by one.
"Skeptic Turned Believer"
I did not think one tool could really replace my whole kit but it has. The relay socket alone is worth it.
"Perfect For Working At Night"
The built-in light is such a small thing but it makes such a big difference when you are under the dash after dark.
Stop Guessing. Start Testing.
TryEverlyn's SmartProbe Car Tester takes the guesswork out of car trouble by letting you test power, ground, fuses, and relays with one tool. Instead of juggling a multimeter, test light, and relay tester, you get a straight answer in seconds and can fix the problem instead of chasing it.
Frequently Asked Questions
How do I get the best results with TryEverlyn's SmartProbe Car Tester?
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Clip the leads onto your battery terminals first so the tester has power, then use the probe tip on wires, fuses, or components, or plug a relay directly into the built-in socket. The digital display and red and green lights will show you exactly what is going on with your circuit.
Will this work on my vehicle?
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Yes. TryEverlyn's SmartProbe Car Tester works on any 12V or 24V vehicle electrical system, which covers the vast majority of cars, trucks, and SUVs on the road today.
What if I don't like TryEverlyn's SmartProbe Car Tester?
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Try it risk-free for 60 days. If you are not happy for any reason, we will refund you in full under our 60-day money-back guarantee, so there is nothing to lose.