Review on π RV Trailer Plug Light Circuit Tester Adapter - 7 Way Blade & 4 Pin Trailer Wiring Tester for Boat SUV Truck by Giles Lacoste
Works as advertised
No test light or multimeter required. This makes it quick and easy to check your tractor's plug to ensure all pins are receiving power. I hooked up my trailer and found the left turn signal not working. Plugged the adapter into my truck's 7-pin connector and found no power at the left turn signal connector. The fuse for the left trailer turn signal in the underhood power supply has blown. Replaced fuse and all is good. Diagnosis and repair took less than 5 minutes. For those who have complained that the LED lights face down when the adapter is plugged in, this means the trailer fork may be fitted upside down on your truck. The key on your trailer fork should be in the 12 o'clock position.
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- Unreliable
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