Hi, folks. I tore into my 90 740GL in-tank system today.
A few notes:
-I strongly recommend a 5-gallon bucker and lid from home depot for storing the sender if you need to.
-I also strongly recommend a respirator that filters organic vapors - I got one for like $15 at harbor freight and it works great.
-Aluminum foil makes a pretty good cap for the tank if you need one.

Anyway... it's a slight mess inside the sender. There was a leak/split in the top rubber hose (and an attempted patch), an annoying amount of rust, and also a mess with the wiring. I'm here with questions about the wiring.

Does anyone know how the pass-through is designed exactly? 2 of the wires soldered to the passthrough pins snapped off and they're pretty corroded. I wiggled one of them back and forth twice and it snapped off too. Same issue on the fuel level connections. I'm having issues sharing images right now, but I am not sure how these are soldered in. The only thing I can figure is that its a hollow copper/brass tube that the wires were placed inside, then they were filled with solder like in this design - https://i.ebayimg.com/images/g/UlkAAOSwCUJhf0D8/s-l1600.webp

If that's the case, it's going to be tough to get them hot enough, but I'll be able to replace the wiring quite easily. Can anyone confirm this is their design too? Or something else?

Thanks in advance and happy bricking!
Will