Burnt lead on fuel pump?
The connctor marked A -H is a reference only . A reference for the wire diagram. The wire diagram will show where it goes in relation to the connector letter.
It could be power , power return , gound or the same for the sending unit and temp sensor circuits.
I dont have access to online diagrams. They have manuals at my main library here across town in the ref section. Some other post said how to search libraries for online manuals but are does not have that service. Seattle public libraries do.