EM415Pro Automotive Short and Open Finder Explained
As an Amazon Associate we earn from qualifying purchases. Details
The EM415Pro name appears on several listings for one kind of tool: a transmitter and a receiver that trace a wire and show whether a DC circuit is open or shorted. This post compares the six automotive finders in the research file.Five of the six list a 6 to 42 V DC range, and one lists 9 to 30 V. Figures were checked on 11 October 2026 and are shown as the sellers give them.
Quick answer: the UT-LNTELA EM415Pro listing and the CrysGuard EM415PRO kit describe the same kind of 6 to 42 V DC short and open finder with a transmitter and a receiver. The AWBLIN and ATOBLIN listings are the most alike, since both list part number 681. The VDIAGTOOL V500 Pro does more than trace a wire, so it suits a shop that also needs its oscilloscope and injector tests.
The six finders at a glance
| Finder | Voltage range stated | Functions listed beyond tracing | Included parts (as listed) |
|---|---|---|---|
| UT-LNTELA EM415Pro (B0F8N5VD4F) | 6 to 42 V DC | 7 inch flexible probe | Transmitter and receiver |
| AWBLIN 681 (B0FVLWSHPW) | 6 to 42 V DC | Breaker point locating, three receiver modes | Transmitter, receiver, two 9V batteries, manual |
| CrysGuard EM415PRO (B0F9RW3JKB) | 6 to 42 V DC | Continuity mode, alligator clips | Transmitter, receiver probe, test leads, 9V batteries, tape, case |
| VDIAGTOOL V500 Pro (B0DLJS3CVM) | 9 to 30 V (title gives 9/30V) | Oscilloscope, multimeter, injector and relay tests | Probe tester kit |
| TrueTrace Solderstick (B0H4NM6VYQ) | 6 to 42 V DC | Adjustable sensitivity, flexible receiver | Not stated in the listing text |
| ATOBLIN AT-681 (B0GKG8JWDX) | 6 to 42 V DC | Automatic short and open identification, low-voltage indication | Transmitter, receiver, two 9V batteries, manual |
How we chose these six
All six results are automotive short and open finders, so none was removed for fit. The file is a single keyword match, and several listings share wording. The AWBLIN and ATOBLIN listings give the same part number and near-identical bullet text, and the listings do not say whether they come from the same maker, so they are described side by side. We did not test any of these tools, and nothing below reports personal use. Where two listings disagree, both figures are shown.
1. UT-LNTELA EM415Pro Automotive Wire Tracer
The listing describes a wire tracer that helps locate open wires, short circuits and circuit paths, using a transmitter and audible receiver feedback. It states a 6 to 42 V DC range for car, trailer and truck diagnostics, and includes a 7 inch flexible probe that the listing says bends around dashboards, fuse boxes and harnesses. The receiver and transmitter together measure 10.04 inches by 4.92 inches by 1.38 inches. The model field in the listing shows the ASIN, not a manufacturer model number. Check the UT-LNTELA EM415Pro on Amazon.
2. AWBLIN Wire Tracer Automotive Short and Open Finder
The AWBLIN listing gives a DC 6 to 42 V range and describes a sound and light signal. The listing says a green flash means an open circuit and a red flash means a short, and it says the receiver has three function modes. The kit includes two 9V 6F22 batteries and a user manual. The listing offers a one-year warranty and weighs 0.34 kg. Its part number is 681, the same as the ATOBLIN listing below. Check the AWBLIN finder on Amazon.
3. CrysGuard EM415PRO Automotive Circuit Tracer
This kit is listed for DC 6 to 42 V vehicles and boats, and its title pairs the EM415PRO name with open and short detection. The listing describes a continuity check in a separate CONT mode for wires and cables. The kit has the most included parts of the six: a signal transmitter, a receiver probe, test leads, alligator clips, 9V batteries, insulation tape, a case and a manual. The listing states CE, RoHS and UL compliance. Check the CrysGuard EM415PRO on Amazon.
4. VDIAGTOOL V500 Pro Automotive Circuit Tester
The V500 Pro is the odd one out in this list. Its title gives a 9/30V range, which differs from the 6 to 42 V figure in the other listings, and the listing says it runs from a vehicle battery or a cigarette lighter socket. Beyond tracing opens and shorts, the listing describes an oscilloscope mode, a multimeter mode, an injector test that outputs pulse signals, and relay, fuse and trailer light tests. The model is listed as VDT-V500-PRO. A buyer who needs only a wire tracer would pay for functions the listing says the tool has. Check the VDIAGTOOL V500 Pro on Amazon.
5. TrueTrace Auto Circuit Tester by Solderstick
The TrueTrace listing states a 6 V to 42 V DC range and adjustable sensitivity, with audible guidance from the receiver. The listing says the flexible receiver bends around tight spaces behind dashboards, doors and engine compartments. It lists cars, trucks, SUVs, motorcycles, RVs, trailers and marine systems as compatible. The listing gives a part number of RSHV and does not state a battery type, a weight or a size in the text used here. Check the TrueTrace auto circuit tester on Amazon.
6. ATOBLIN AT-681 Automotive Wire Tracer
The ATOBLIN listing describes a tracer for DC 6 to 42 V systems, with the same two 9V batteries and user manual as the AWBLIN kit. Its bullets say the tool identifies the circuit state automatically once the transmitter is set to the short or open position. The listing also adds a low-voltage indication, because it says other finders can read inaccurately when the battery is low. For noisy shops, it describes a sound and light indication that is easier to tell apart. Its model is AT-681. Check the ATOBLIN AT-681 on Amazon.
Worked example: does a 12 V or 24 V vehicle fit each range?
Take a 12 V car system and a 24 V truck system. Against the 6 to 42 V range that five of the listings state, the car sits 6 V above the floor and 30 V below the ceiling, and the truck sits 18 V above the floor and 18 V below the ceiling. Both fit. The VDIAGTOOL range is 9 to 30 V, so the car sits 3 V above its floor and the truck sits 6 V below its ceiling. Both still fit. The car has far less margin on the VDIAGTOOL floor, 3 V against the 6 V on the other listings, so a buyer with a low-voltage system should check the floor figure first.
What the listings do not say
None of the six listings gives a test result from an independent lab, and the detection claims in the bullets are the sellers’ own. The TrueTrace listing does not state a battery or a weight, and the VDIAGTOOL listing states its range only in the title. The AWBLIN and ATOBLIN listings share a part number, so their accuracy and build cannot be separated from the data.
Frequently asked questions
What does a short and open finder do?
It sends a signal along a wire from a transmitter, and a receiver traces that signal. The listings describe it as showing open circuits, short circuits and broken wires, with sound or light feedback.
Are these finders rated for a 12 V car system?
Yes. Five of the six listings state a 6 to 42 V DC range, which includes a 12 V car system. The VDIAGTOOL listing gives 9 to 30 V in its title, which also includes 12 V.
Can I use these on household AC wiring?
The listings are written for DC automotive, boat, trailer and RV systems. None of the six states an AC mains range, so none is listed for household AC wiring.
Why do the AWBLIN and ATOBLIN listings look alike?
Both list part number 681 and carry similar bullet text. The listings do not say whether the two come from the same maker, so compare the included parts and the warranty before you buy.
Does the VDIAGTOOL do the same job as the others?
It traces opens and shorts, but its listing also describes oscilloscope, multimeter, injector and relay tests. If you need only a wire tracer, those extra functions are not needed.
Conclusion
For a wire trace on a 12 V system, any of the five 6 to 42 V listings fits the job. The CrysGuard listing names the most included parts, and the AWBLIN listing gives a stated warranty. Choose the VDIAGTOOL when you need its oscilloscope or injector functions. For more on this kind of tool, read automotive electrical short finder, auto short finder, automotive wire tracer and best power probe short finder.
UT-LNTELA EM415Pro on Amazon · AWBLIN 681 on Amazon · CrysGuard EM415PRO on Amazon · VDIAGTOOL V500 Pro on Amazon · TrueTrace Solderstick on Amazon · ATOBLIN AT-681 on Amazon
