VDIAGTOOL V200 Pro Automotive Circuit Tester, Power Circuit Probe Tester Breaker Finder Tool, 12/24V Electrical Open Short Circuit Finder, Wire Tracer, AC/DC Trailer Relay Fuse Test for 99% Cars

This probe will allow you to easily test automobile, RV, boat, and trailer wiring. It is packed with features that allow the probe to test voltage, resistance, and perform signal tracing. You will be able to energize electical parts like lamps and relays with the probe. The tool comes packed in a nice padded case that holds the probe, probe tip, breaker test probe, cigarette lighter adapter, a 20 foot extension cable, and battery terminal clamps. I first learned to operate the tool by performing some simple tests. Connecting the probe to the vehicle's power source is easy. You can connect right at the battery using the included clamps or with the lighter plug. By placing the the probe into Mode I, it can measure the battery voltage by pressing the rocker switch forward where the digital display will then display the positive voltage. Pressing the red button will scroll through the tool's feature set - DC voltage, AC voltage/frequency, resistance, and diode testing. I measured the resistance of my old VW's ignition coil with the probe (you can see the measurement in one of my photos). This is a useful feature for measuring resitance of relay coils, carb thermostats, and idle solenoids. When you push the rocker switch forward, the probe tip is connected to positive battery voltage. You can use this feature to power and test bulbs, relays, and solenoids before you install them into the vehicle (or check them while they are in place). The probe tip can pierce wiring insulation to allow testing without disconnecting wires. I especially appreciated the inclusion of a 20 foot power extension cable that will allow you to move the probe to far reaches of the vehicle. There is no need to make power connections at another part of the vehicle. There is a signal tracing feature when the tool is placed into Mode II. This will allow a signal from the probe to be placed onto a wire and you can then use the breaker probe to move along the suspected wire. A tone is heard from the tester as you move along the wire and will cease when you reach the breakpoint. I used this feature to finally locate the reason the rear lift gate on my Ford Escape would not raise with the foot activation. I found a break in the sensor wire right as it entered a multi-wire connector. I was able to solder a wire around the connector to get the liftgate to work once again. The probe paid for itself on just that one job. A dealership repair would have cost hundreds of dollars. The instruction manual is a bit hard to understand, but there are several excellent Youtube videos that review this tool and show how it can be used. If you compare this tool to the PowerProbe 3 or 4, you will see it works very similar but at a much reduced price. I really like this tool and look forward to finding other uses for it.

I am a serious DIY automotive enthusiast. I am also an electronics engineer. I purchased the Vdiagtool V200 Pro to assist me with a vexing electrical problem. I bought the V200 Pro after watching a YouTube video and anxiously awaited receiving it. I was impressed with the obvious build quality. The wires are well insulated and flexible. It feels great in the hand. I have a 2010 Ford F150 with a 5.4L V8. I had it parked in my back yard and rodents got into the engine compartment and chewed up some of the wiring. It also had a problem with the AC clutch compressor being inoperable. The engine ran poorly with multiple misses and engine light came on and could not be reset. I used a code scanner to determine three of the injectors were not working. The wiring goes from the injector into a harness that disappears into a loom. I placed the V200 into AC mode and started the car. I then went to the injector connector and touched the terminals of the injector…. nothing. I then used a small terminal to connect the red wire of the probe to the injector and set it to signal trace mode. I grounded the black wire. I then ran the signal tracer over the wiring harness while listening to the “warble.” It took less than 60 seconds to trace the harness to the point where the signal stopped. It was buried inside a complicated and loaded harness. Closer inspection showed there were visual indications of the wire chewed in two pieces on the bottom of the harness by those pesky rats. I would have had great difficulty finding it with another method. I was able to repair the harness by cutting the loom and soldering the wires back together. I then found two other wires the same way. The engine was now running great! No misfires and the injectors all working! I then began to play with the V200 in its normal voltage measuring function. The engine was running and I noticed that the voltage of the battery was 12.2 VDC instead of the expected 14.4 volts. Those pesky rats were at it again. With the help of the V200 I quickly located the wire to the field terminal of the alternator. It was chewed at the connector. A quick repair and all is well. Having such a good day I decided to look at the nonfunctional AC compressor. I pulled the AC relay under the hood. Using the V200, I probed the coil terminal and determined it was not being actuated when the AC was turned on. I then moved to the relay output and used the V200 to simulate the relay operation by injecting battery voltage into the output terminal. The compressor clutch immediately engaged. The problem was evident. The compressor was prevented from operating because it was so low on refrigerant that the low-pressure sensor prevented it from turning on. In this vehicle, you cannot add refrigerant without the compressor running. I used the V200 to activate the compressor, and I added R134. In a couple of minutes, I was ready to go and was able to replace the relay, which then operated on its own. The bottom line is that I very much like the V200 Pro. It is a great tool. Well made and very versatile. It made a tedious task easy and saved me much time and effort. It is a well-made tool and has earned a top spot in my toolbox. It will easily perform almost any electrical diagnostics on an automobile. It will not replace my Fluke multimeter for critical measurements, but that is not its purpose. This makes troubleshooting wiring for almost any automotive circuit. Taillights to wipers, blowers to power windows, relays to seat controls. This is now my go-to favorite! I have oscilloscopes and meters of all types, but nothing works better for me when working on automotive wiring. I plan to buy another for my son for Christmas.

I found this to be a very helpful tool to sort out problems with wiring. This made finding a broken wire in a harness much faster and easier than with a multimeter, loose wires and alligator clips. I first used it to find a break in a wiring harness on a motorcycle which you can see in my video. I found the break in less than a minute with the tester and without pulling everything apart. When using the probe the screen turns green showing you're touching a ground. A hot wire turns it red and shows the voltage. It also has a handy feature which allows you to momentarily put voltage to the tip of the tester or ground it to check the wiring or the device. This could be really handy if you're checking trailer lights. And with the 2- 20' cables, it give you a lot of distance to reach a long distance. The led lights on the tool are nice when you're trying to see in dark spaces without having a flashlight. It will do voltage tests for AC/DC, polarity, continuity and diode tests. But for me the most useful is for finding broken wires or checking continuity over a long distance. I've spent a lot of time in the past trying to track down a broken internal wire on a harness and this will make short work of it. It takes power off the vehicle battery using alligator clips provided or the cigarette lighter plug from the kit. It has a built in breaker which resets after about 15 seconds, so if you accidentally hit the wrong polarity you won't damage the tool. But you do need to be careful if you use the probe to push power to a device. You would want to be careful around automotive computers with the probe and pushing and voltage. I even used it for an application it wasn't really designed for. I needed to trace some wires in my house walls and ceiling. Using a 12 volt power pack I was able to trace both ends of the wires for a continuity check using the V200 tester. Of course I had the breaker shut off and the wires were disconnected from their terminals before I tested. I was able to figure out which wires went where in minutes. Much quicker and easier than what I would have done in the past. It would be nice if it could be used for higher AC voltages. But overall I found it quite helpful for sorting out DC wiring on vehicles. And it can also be used for low AC voltage checks which would be helpful with automotive applications. I'm quite please with this tool and I'm sure I have friends that will want to borrow it or buy one for themselves!

The V200 Pro is an excellent tool to have for vehicle diagnostics. The power probe is great for applying power to activate components. It gets power from the vehicle's battery you are working on. This is the only knock I have against the V200 because you have no choice to use it on it's own or if the battery is dead, but this is also true for much more expensive power probe tools. One positive note about this is no chance of corroded batteries inside to destroy the tool which will make the tool last a much longer time and no need to charge or replace batteries. The r134a was low on a car's ac system I was working on and the compressor would not run. With the V200, I was easily able to apply power to the compressor and confirm the compressor is working. Also, using the V200's power probe to activate the compressor allows the refrigerant to quickly enter the system until there is enough pressure to run the compressor on it's own. Also using the power probe, you can bypass relays in the fuse box to activate components. The wire tracer is a handy tool to trace wire runs and test for short circuits. The door ajar warning light would not turn off on a vehicle I was working on. I figured it was either the wire to the door ajar sensor may have been broken somewhere or the sensor needed replacing. I was able to use the V200 wire tracer tool to confirm the wiring was good. The sensor was replaced and the problem was fixed. The VDIAGTOOL V200 is a high quality tool that will pay for itself the first time you use it to diagnose expensive repairs. The graphing portion of the multimeter gives much easier to read data than a normal multimeter. The fuel pump was suspected bad on a vehicle I was working on. I wasn't convinced that the pump was receiving the signal from the computer. The signal was supposed to be a duty cycle of 50% but without a graphing multimeter such as the V200, I was unable to confirm the signal. I gambled and replaced the fuel pump and it worked, but if I had this tool at the time, diagnostics would have been a breeze and potentially could have prevented unnecessarily replacing of parts. For anyone who is interested in vehicle diagnostics and repair, I highly recommend the VDIAGTOOL V200 PRO along with a good quality bidirectional scantool, such as the XTOOL D7 or D8 as recommended by Scotty Kilmer.

Very handy tool to find shorts or power up circuits.

If you have an automotive wiring problem this tool can help you diagnose the issue. I like that this meter has a graphic display of AC waveforms for testing PWM circuits or injectors. The meter will also allow you to measure DC voltage, Ohms and even test diodes. There is a second tool for tracing wires that is very helpful as well, especially since most automotive wires are covered in protective sleeves or wrapping and it is difficult to know where your wiring is going without unwrapping everything. There is an extension cord included if you are working on something with long wires such as trailer lights or maybe an RV. This tool costs less than an hour of shop time so if you are handy and understand basic electronics you can save yourself some money and use this tool to find any wiring issues you may have. I really like that it all comes in a small case so it is easier to keep all the pieces together. Note this tool is designed for automotive use and can NOT be used for household 120VAC or 230 VAC.

As a DIY mechanic, this tool was an amazing upgrade to the digital volt meter (DVM) I have used over the years to diagnose electrical problems. While VDIAGTOOL V200 Pro incorporates many functions of a DVM, the first thing is you never have to worry about dead or corroded batteries as it uses the power source from the vehicle it is diagnosing. In moving from a DVM to the V200 Pro, it requires some additional instruction and precautions to eliminate damage to circuits you're testing. For instance, unlike a DVM, the V200 Pro has the capability to power a circuit in order to check relays, bulbs, fuses, etc and you need to understand wiring schematics and characteristics before applying voltage to modern car circuitry. There is a nice concise manual included with the V200 Pro that gets things started and there are multiple online videos that can teach you more on the real-world operation of the tool. There are competitors in the marketplace and while many of their features are similar, the VDIAGTOOL V200 Pro is an unbeatable value for its price. Some of the other things it is capable of doing is testing relays, fuses, resistors, ohms, continuity, and something that is very helpful is the "circuit breaker finder" that is included in the kit. To note; the circuit probe runs off the vehicle's battery/power, the circuit breaker finder is shipped with and requires one, long-lasting 9V battery. While I have not had any broken circuits to repair since I purchased the V200 Pro, I tested the circuit breaker finder and found it to be quite helpful finding a circuit within a wiring loom. My test was on the headlight of my 2014 Jeep Grand Cherokee and I used the circuit breaker finder to track the wiring from the fuse box all the way to the headlight. This was beneficial as the main wiring loom breaks down into several smaller looms around and behind parts and structural pieces. The circuit breaker finder made it easy to trace all the way to the headlight. There is a volume control on the circuit breaker finder to help squelch "noise" from competing sources. The VDIAGTOOL V200 Pro comes with an approximately 16' long cable that easily reaches most vehicle's battery, and if you're servicing a big RV or trailer of any kind, it comes with an extension that is about 16' feet in length that should take of 99% of diagnostic situations you'll find yourself with. In addition to alligator type clips for the battery, there is a cigarette lighter plug that can be used for power as well which add to your accessibility. Overall, the VDIAGTOOL V200 Pro is a very capable electrical diagnostic tool and is rated for systems ranging from 12V to 24V. Each time I use the tool, I continue to learn more about it and with it's capable of. Having the VDIAGTOOL V200 Pro in your toolbox will set you up with the equipment and technology to handle most vehicle electrical challenges you might face.

The test probe seems to work perfectly but the relay identifier and everything is intermittent