This product works great and it's very handy to have for the DIY.

This tester functions similar to another I used to have that was considerably more expensive. Has all the basic functions you'd expect one of these to have, If you're not familiar with this style tester, be sure to read the manual and do some surfing to find suggestions for use. I will say it can be really handy for tracking down broken ground wires and isolating power leads in vehicles.It might not be as pretty as some of the more expensive alternatives, but it works fine and for the price is a great value.

This is something I got to add to my arsenal after getting a new dash cam that requires hardwiring to vehicle in order to use the 24/7 motion activated monitoring feature of the camera. Luckily I read some other reviews before I used this and calibrated the meter accordingly. This isn't something you'll find in a pro shop, but for the weekender or backyard mechanic this is a great, accurate, and functional choice. The wires were on the thin side, but I don't see this getting the constant, daily use that something in a commercial garage would, especially not from a weekender like myself.I definitely recommend this vehicle circuit tester.

The electrician that I apprenticed under carried a little red neon light probe with him all the time. It had a clip and lived in his pocket protector, next to screwdrivers, a few odds and ends, plus a cigar for lunchtime. That was in 1970, so I do have a history with them. I shouldn’t be so opposed, but I am. Or at least was.I began to realize a probe is a form of shorthand. I began to really appreciate them when working with my son. He is a trained mechanic and I tuned up my mother’s car in 1968. He learned everything the right way, I learned from the college of hard knocks. But we do know how to use ‘real’ diagnostic tools and own a lot of useful meters, etc. My background in electronics has helped in this age of computer controlled everything.To begin, this tester needed to be calibrated. All that skinny wire exacts a toll on voltage and adds impedance. To get meaningful readings, we check the tester at the battery, noting what it believes to be full power Being fully calibrated, we can be confident of voltage readings elsewhere. If we find an appreciable drop in voltage at some point, that is worth investigating further. (If we find a big increase in voltage at a connection and the car is not running, I have Scully and Mulder on speed dial.)So far, this Tester has shown it’s worth and works as well as my son’s professional probe for what we have been doing.If we find a head scratcher, we pull out the big guns. But many times, it is a connector, an abraded line, or if a component is getting full voltage and it isn’t doing its job, it merits further testing.If you need to get into the world of automobile electronics, you won’t go wrong with this tester. It is a good beginning and it doesn’t have a steep learning curve.I gave this Automotive Car Circuit Tester 5 stars, because it works, it is in the KISS school of thought (Keep It Simple Stupid!) and it taught me that I don’t need use a $300+ tool for the simple stuff.

Awesome product

Every auto enthusiast should have this tool

Very good

I hit a large buck and it did some serious damage to the driver's side fender, bumper cover, and headlight assembly. Nothing that I couldn't fix myself, or so I thought. After finishing the repairs, I was driving home through a wooded area one night and realized that I had no tail lights. The car is black and vehicles behind me could not see me until they were like 5 feeet behind. Very dangerous. I checked the fuse and it was blown. I replaced it, turned on the lights, and it blew again. I tried some other things and the fuse kept blowing. I hate electrical problems like this. I visually checked all connections near where the accident damage had occurred and couldn't find the problem. It became a nightmare. The ground fault could literally be anywhere. Without this tester, I could have spent more time on this problem than I did replacing all of the damaged auto body parts. The Autokcan Automotive Car Circuit Tester arrived and within 20 minutes I had found the problem without even reading the manual. I had made a mistake hooking up the the turn signal/running light in the new headlight assembly. The turn signal worked but the running light wiring as blowing the fuse. I didn't realize that the wires that turned on the turn signal and running light were both negative. While I should have found this with my multimeter, I didn't check polarity because I was certain there was one ground wire and two positive wires that controlled both functions of the bulb. It was the opposite of what I thought.One of the many things this device does is it checks polarity in a way that you can't miss. It's the first thing you see when you touch a wire. The reason I hate electrical problems like this on a vehicle is I don't have a lot of experience fixing them. If you take it to a real mechanic, it's going to be at least $100 and maybe a lot more. I had heard about a device called a Power Probe, but didn't understand all that it did. This device is very similar to a basic Power Probe that sells for around $50. It's super cool and, while I don't anticipate having a lot of electrical problems on my vehicles, it's good to know I'll have this handy when one of these dreaded problems happens again.This device helped me save $100 or more. The price is very reasonable. The build seems very sturdy. I seriously wish I had one of these in my tool collection years ago. I have experience spending hours trying to resolve electrical problems only to end up taking the car to my mechanic when I realized I couldn't fix it myself. Now I have a much better chance of successfully DIYing it.One con for some people is it doesn't come with a nice blow mold plastic case. That's not a problem for me. While a case like that is attractive, years ago I realized how much space they took up. I came up with a system that let me throw out over 20 of these cases and I'm glad I did. I'd probably have over 50 of them by now. Wading through 20 cases was hard enough. I don't even want to think about have more than double that number, lol. That said, any small plastic box will do the trick with this device if you want to store it that way. It doesn't have a bunch of attachments. It's just one item with a long wire assembly.