Did this mod a month or so ago, another one of Tom’s good tips. My fuel gauge had been reading low for quite a while , and then started acting even more erratic. Tom posted on samba a clever fix.
The short story is that the sender ground path is from the steel sender plate to a lug in the engine compartment, but the connection at the sender plate becomes corroded. Instead of trying to clean that corroded connection ( spade is steel not copper) , just add a ground wire from plate stud to somewhere close by on the body.
The only gotcha in this method is that the studs can be corroded and a stud may break when trying to loosen the nut. So plenty of penetrating oil and some good judgement in how much to force things is needed.
Pics are self explanatory , the samba link is the best reference.
This fix worked for me. Fuel gauge now much more accurate .
shooftie 
#1 by Simon McVaugh-Smock on June 11, 2024 - 6:06 pm
Thanks Alistair (and Tom)!
I’m delighted to see this as I’ve recently been having the same erratic fuel readings. AND, it looks to be within my competency, assuming I don’t bust a stud! A job for this weekend 🙂
#2 by albell on June 11, 2024 - 7:11 pm
If you can…, try and reach in and spray stuff on it in advance