We made this little repair, you will need a multimeter and patience. :D
You have to pull out the fuel pump unit, the sending unit is attache with it. You could do it without dropping the tank.
Diagnotic:
- Could be a connection,You will see a wire attached to a rivet, check for the contact.
- If not working, You will open the little plastic cover of the sending, you will see a coil of wire. Check the coil for any wire cut(variable resistance). The reading should be between 0-95 ohms.
I think:
95 ohms for empty
0 ohm for full
Good luck :waving:
PM me if you need more info