Auto Parts: F-150 relay, dual fuel tanks, ford f 150

Question
I own a Ford F-150, with a 351 ci engine and 4- barrel Holley carb. There is a relay that connects to the electric choke heater and the vapor valves from the dual fuel tanks. No one seems to know what this relay is. It carries a Ford part number, F4TB9C872DA. Any information you could supply concerning this part would be greatly appreciated. Thanks for your time.

Answer
Hi Wayne,

I have to join the rest in not knowing what that part is. My program does not have that ID available for interchange so I cannot offer any advice. Sorry.

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