If it is an open circuit, the LED light will not light. Besides, sharp stainless steel probe for piercing wires effortlessly, also for hard to reach tight areas.
eBay
Topdiag P60 Automotive Circuit Tester: A Perfect Choice for Every Car Owner and Maintenance Technician. Model: P60. If the display lights up green and a tone sounds, you have verified that the wire is shorted.
eBay
An absolute must for every technician looking for a fast and accurate solution to electrical systems diagnostics. KM10 PowerScan Electrical System Diagnostics Circuit Tester is used as Power Probe for testing vehicle electrical circuit.
eBay
The high sensitivity probe reflects the result on the indicator light, also suitable for narrow areas. Insulated protective rubber tip protects you from electric shock. The alligator clip is convenient for one-handed operation, greatly improving your work efficiency.
eBay
HUAQI 6 12 24V LIGHT PROBE CIRCUIT TESTER. Heavy Duty electrical tester car van boat tester. 1 Auto circuit tester. Light illuminates when circuit is complete. Colour: Green.
eBay
US PRO AUTOMOTIVE POWER PROBE 6 - 24 VOLTS DIGITAL TESTER 6789.
eBay
1.Multimeter Mode(Voltage, Resistance, Diode& Short, Current, Frequency) 2.Smart Test 3.Oscilloscope Mode 4.Relay Test 5.0-5V Power Supply 6.Component Activation & Signal Circuit Test 7. Fuel Injector Test 8. Locating Open Circuit 9.Wide Compatibility 10.Simple Operation & Safety Protection 11.Support 9 Language 12.Online Update & 2 Year Warranty & 24/7 Tech Support.
eBay
Sharp steel probe easily pierces wire insulation to inspect circuits. Bulb: 3W, Bulb Cord Length: 102mm/4.0". The circuit board has line protection function, which is safer and more resistant to burning.
eBay