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Hello, do you have a brand name to go with that model number, and can you tell me about how old the furnace is?
There should be a wiring diagram glued inside the blower service panel, if you can take a well lit, well focused, close up photo of that, and attach it here using the paper clip icon at the right end of the tool bar above, that will help a lot also.
It will also help if you can tell me a lot about your technical background so that I will be able to approach the situation with you more effectively.