Fuse box fuel pump relay orientation

thegreencantina

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Buick Ownership
2009 Buick Lucerne
Does anyone know what the four slots for the fuel pump relay are on the fuse box? The relays will go in either way, but as one of the pins is a ground, I would have to assume that orientation matters. I can't just put it in like the old one was, as I don't have the old one and the new one doesn't have any printing on the top. It just has the posts labeled 85, 86, 87, and 30. I'm troubleshooting relay and fuse box issues, and need to know for sure which slot is which. Especially the 30 and 86 slots. I've looked endlessly and all I can find is fuse box diagrams showing where the relay goes, but not the direction it is installed. Thanks!
 
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