If you're not getting a light on the LED whatsoever, it indicates that the unit isn't getting power through the trailer connector. Use a circuit tester like # PTW2993 on the pin in the 1:00 position in your 7-way trailer connector. If the connector isn't getting power on that pin, there's likely a fuse missing in the power distribution box in the engine compartment. You're looking for the 'Trailer 12V' or 'Trailer Charge' circuit. A fuse panel diagram wasn't shown in the online owner's... view full answer...
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