Most LED light assemblies have a voltage regulator circuit on the chip. Sometimes a chip will produce interference with the TV signal or with the AM/FM radio signal. Often times, just changing out the LED assemblies with a new one will fix the problem. The easiest way to determine which LED is the "offender" is to use a known good one (one that you can turn on and it doesn't cause the TV problems) and change all the LED's in the trailer, one at a time. If you replace the first and there's no improvement, use the one you took out to replace the second LED, if no improvement, use that one to replace the third, etc. Keep "chain changing" the LED's until you find the culprit.
From the way it sounds, your reading lights are 110 VAC (since you say you plug them into the normal sockets), so you might try moving the lights to the other location. Sometimes just moving the "bad regulator" will get it out of the RF line of interference. If that doesn't work, maybe buy one new LED assembly and replace it in one of the lights, turn it on and see if there is any improvement.
My guess is that you've got a "interfering voltage regulator" on one of the chips.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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