First thing I'd do is check the fuse(s) with a multimeter. Visual checks don't always work well.
If fuse is good, I'd then visually check the lamp sockets for damage and check voltage with a multimeter.
If sockets good, I'd test the LED modules by hooking them up to an 12V DC supply.
Wiring diagrams and more are in the FSM (link in my sig).
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