Those thin wires going from top to bottom inside the sender are the resistance wires. First, I don't think anybody mentioned that the sender must be taken apart-carefully. I remember a small nut on one end to remove the outer alum. tube. The low fuel light lights when the float reaches its bottom travel & makes contact with a brass contact. Clean all the crud with something strong, but friendly to plastic & you should be good to go. Make sure the float is sliding on the wires correctly before you reinstall. Paul.

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1984 300CD red/blk 290,000 partial resto
1980 240D 4 sp Brn/palomino gone
1997 Mazda Miata STO edition wife's baby
1988 Lincoln Mark VII LSC next resto
1986 Subaru GL wagon daily
1993 Isuzu pickup field beater
2008 Honda Civic EX-L 5sp wife's new car
1978 Honda XL350
1974 Honda XL70 my Calif. ride in HS