1 Car Circuit Tester（without battery）. Long test lead : The cable length is about 16ft which allows you to test any electrical system easily. Due to different monitors and different lighting, pictures may not show the actual color of the item.
eBay
10MW/10KM Visual Fault Locator, Fiber Optic Cable Tester 10KM Range Test Equipment Red Light Pen VFL
Aliexpress UK
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
TOOLTOP Network Cable Tester LAN Line Finder PoE Test Digitalized Cable Tracing Breakpoint Ethernet Cable Checking
Aliexpress UK
The total length of the tool 200mm (this includes the probe). Simply hook the unit on to the vehicle's battery, then you can conduct a positive or negative battery current to the tip by rocking the power switch forward or backward.
eBay
1PC Crocodile RG316 RF Coaxial Cable SMA Male Plug to Dual Alligator Clips Red&Black Tester Lead Wire 30CM 50CM 1M Connector
Aliexpress UK
It is no exaggeration to say that Topdiag P150 electric tester stands a more perfect and efficient diagnostic experience! And P150 electrical circuit tester is built-in circuit breaker protection for the user and vehicle's safety.
eBay
4 in 1 OPM Multifunctional Optical Power Meter Visual Fault Locator Network Cable Test Optic Fiber Tester OPM 1mW 20mW 30mW VFL
Aliexpress UK
Probe shape: Cone shaped. Signal strength display mode: LCD digital display. Safe electrical inspection and insulation operation make safety easier.
eBay
Satlink ST-6986 PRO DVB-S2/S, DVB-T/T2, DVB-C ST6986 h.265 hevc 10bit meter with Fiber Optic tester ST 6986
Aliexpress UK
6V, 12V, 24V repair induction test pen. x Test Light. Testing Range: DC 6V-12V-24V. Quantity: set. Safe and easy to use, no heat in operation. Spiral wire for easy storage. Color: Yellow.
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COMPTYCO FTTH High Quality Visual Fault Locator Optical Fiber Cable Tester Tool 5/10/20/30/50MW VFL 2.5MM(SC/FC/ST) Interface
Aliexpress UK
The VDIAGTOOL V500 circuit diagnostic kit can be used to check the injection status of injectors by using the probe tip to output different pulse signals to the injector. Correct use of the injector test mode can also achieve a cleaning effect!
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G10 Fiber Optic Power Meter Optical Tester Tool Network Cable Test OPM LED Lighting VFL USB Charging
Aliexpress UK
PRACTICAL FEATURES: Compact pen design with pocket clip for easy carrying and quick accessibility.
eBay
AUA-Y510A Optical Power Meter(OPM -50 ~+26dBm)&Visual Fault Locator(50/1/10/20/30mw VFL) FTTH Fiber Tester Tool Kit (Optional)
Aliexpress UK