Look carefully at which LED's you bought. Some LED's are rated at 12VDC. They are not compatible with voltages higher than that. Most (no, all) RV converter/chargers routinely charge batteries at 13.6 volts (higher than the rated LED voltage of 12 volts) Many of them will simply not function at higher voltage and like a fuse that carries too much current, they burn out.
"RV compatible" LED's should be rated at 12-24 volts. Most of them have a built in voltage regulator in the "chip" others have an "add on regulator" mounted on the assembly. Either way, the voltage is always "reduced" to 12VDC and the LED's are "happy"
You've probably got some "unhappy LED's" Check the specs on the website for the LED's you ordered. I'm pretty sure they will have an annotation that the input voltage is "12 Volts DC". Look for replacements that are listed as "input voltage 12-24 Volts DC"
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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