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Good Morning, I have a 2015 F350 that I bought new. Installed LED lights under the running boards and hooked them up to the factory frame mounted connectors.They worked for years. They quit working about 6 months ago. I disconnected and tested the LEDs, they work fine. Checked the voltage on the factory wiring and have 6.5 volts when activating the door locks. Shouldn't this be 12 volts? All other interior and exterior lights work. Any help on this would be greatly appreciated.