I'd guess you have a broken connection somewhere, possibly at one of the lights or maybe elsewhere. It could be on the ground wire, too, which would disable all of them.
In my trailer, the running lights in the stop/turn light housings are also on that circuit. If my memory is not playing tricks on me, I THINK the positive wire for all the lights is colored green and the ground wire is white.
Check your tail lights to see if they function with the running lights activated. If they don't, your lights are wired like mine. The wires behind the tail lights are joined to the common wire leads with wire nuts. These can come loose or the joins can become corroded. I suspect the running lights are connected in the same manner.
I think there is also a connector for these wires in the battery box up front.
- Jack
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Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH, Progressive Dynamics Converter, Fan-Tastic Fan, LiFePO4 battery 12V DC Electrical System, SoftStartRV mounted on A/C
2024 F150 Platinum FX4 3.5L PowerBoost SCrew
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