61 Valiant door won't open

Here's a link to everything the FSM has on the doors. They don't discuss the door locks and latches separately:

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I removed my door lock mechanisms, dropped them in the parts washer and cleaned them up well. Once they were clean, I observed them carefully while operating all the levers and latches until I understood how they operate and that nothing was sticking, and then I lubricated them well and re-installed them.

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