If the RV shop discovered a problem with the assembly, and ordered a new lamp then the problem is probably corroded socket or wiring connections.
The light is on because the power from the park light is cross feeding into the signal lights and the tone would be the aux signal warning buzzer being fed reverse power. Should all be corrected with the new lamp.
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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