Innova 3420 Smart Test Light / Circuit Tester

Cool test light. Product came as described. No problems and shipping was super fast.

This combo tool makes a bunch of electrical jobs (listed on the package) a WHOLE lot easier, and the jobs I used it for went smooth as silk. I used it to locate a "CODE" that showed up in the daughter's 1999 Land Cruiser, and saved a TON of money by purchasing an aftermarket part from Amazon (who else??) and installing it myself. Tool comes with Test Light/Circuit Tester with 6-foot cord and cigarette-lighter plug-in; plus a cigarette-lighter socket that connects to Red and Black alligator clamps for connecting to a 12-volt battery or 12-volt outside electrical source. This is the best tool of it's kind that I've ever seen -- good design, well-made, and versatile. In my view, it's a darn good investment .

This test light has 3 colors: white, red, and green. The white LED indicates that there is voltage going through it, and is useful to add a little light to the area that is being tested. The red LED is for (+), and the green LED is for (-). The brightness of the red LED will help indicate how strong the voltage of the circuit being tested is. This test light is computer safe which is a must for modern electrical systems. It has a built in cigarette lighter style plug that has an internal fuse, and an adapter for connecting the tester directly to a battery. An ordinary test light only indicates the presence of a (+) signal while this tester performs like a logic probe to indicate a ground signal as well. It has a very good ergonomic grip, and is recommended for anybody working on automotive electrical systems.

Works good

Functionality is good, lights are bright and there is descriptions by the lights. I like the idea of plugging into the cigarette lighter. I used on my boat to find out why the radio wasn't getting power.

This was recommended by someone who was doing an alarm install on a car and don’t recall who but it definitely fits the bill for that. With newer cars you can’t use a regular test light. The red or green makes it foolproof and being that ya can just plug it in to the cigarette lighter and start probing is awesome. Saved hours of aggravation for me and worth every penny.

The good things about this test light are as follows: It's cheap, the LEDs are Super Bright, It's small. The probe is SHARP. The alligator clamps are heavy duty, sturdy clamps. As a professional Auto Tech, I use quality tools every day, and this is not one of them. The overall construction of the probe feels cheap. It does not come apart, without breaking it. So repairs that need to be made, or LED bulb changes are NOT possible - in case you were wondering. All that being said, so far it has held up, and does what it needs to. The LEDs are very bright and helpful when working under dashes. The probe is sharp, and the handle is comfortable. The cord is not long enough though at 6 foot. That's OK though because I have already wired in 15ft flexible silicone wire extensions. My main concern with the inexpensive, unrepairable probe, is its longevity. I purchased this to build a DIY Power Probe I designed. For that it so far fits the bill. Although once the low price test light fails, Im stuck dissasembling the whole thing to replace with another test light. Im trying not to complain about something that hasn't happened yet, but I have used Innova/Equus tools in the past, and they always eventually quit working.

My go to tester now.

To start with don't buy this test light expecting it to be the only test light you'll ever need. While this light is very handy for quickly confirming the presence of power and/or ground with no need to switch your lead around like on conventional test lights, it also draws essentially nothing current wise. So as long as 1 strand in a wire has continuity, this light will say power or ground is present, even though a wire may not be able to carry enough current to actually run a component (something a traditional style tester can do since the incandescent bulb does create a known draw). That said for quickly checking a fuse box it's hard to beat this test light since you can even plug it straight into a 12V outlet to verify interior fuses quickly. For everything else, as long as you keep it's limitations in mind, it's an excellent addition to your diagnostic arsenal. After buying mine, this tester impressed one of my coworkers enough to purchase one for himself since it's fairly inexpensive compared to some of the testers out on the market from big name brands.

Excelentes materiales

Excellent. Lights white when has power attached on 12V+ & 12V-, and probe touching ground makes green light turn on and touching a 12V+ makes red go on. Used for my DIY security/remote start installation and was extremely helpful!

Es pesimo, se me han dañado tres de seis que compre en menos de 6 meses, eran buenos, ya los fabrican de pesima calidad, no lo recomiendo, mejor el URREA, vale lo mismo