I had a similar problem. But it involved the kickdown relay. My '84 SEC has a relay in the fuze box that says Kickdown right on the side. And since my kickdown feature has stopped working, I wanted to buy a kickdown relay. So when I searched my usual parts house suppliers with my car info, I see a picture of a "fuel pump relay w/ kickdown". I thought, oh, so that's where my fuel pump relay is. Integrated right there with the kickdown relay.
Turns out my kickdown problem is not relay related.
But I got a spare (found at the junk yard for $2.00). OOOOOyahhhh!

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