General Fuel tank sender unit

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General Fuel tank sender unit

Shepster998

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Hi all,
This is a bit convaluted, so please bear with me!!

I'm currently renovating a '72 500 L. I've fitted a new wiring loom (all good), however one issue I have is that the fuel sender is the type with one electrical connection. The wiring loom has two wires for the sender (red and pink). Originally, I was going to replace the sender but most of the nuts are seized and I've managed to sheer one off.


Am I right in thinking that the screws protruding from the tank that locate the sender unit are welded in place? Has anyone got a workaround for this? I don't want to have to buy a new tank and sender, but can't see any other way.

Or is there anything I can do with the new wiring loom for instance to join the red and pink wires together into one (will that work?)

Thanks all.
 
Last edited:
If you have the fuel-tank out, the easy way around your problem is to carefully drill the remainder of the sheared stud out and tap the hole to accept a small bolt. With the tank out it will be (relatively) easy to remove the swarf from the operation. It would seem that you have a wiring loom for a 'L' model which DOES require 2 wires to go to the tank-unit----1 wire for the 'low-fuel' light and the 2nd wire for the actual gauge. Whilst happy to be corrected by the electrical brains on the Forum, I think that if you can ascertain which wire does the 'low-fuel' light,you can leave the other wire disconnected (but insulated for safety).
 
If you have the fuel-tank out, the easy way around your problem is to carefully drill the remainder of the sheared stud out and tap the hole to accept a small bolt. With the tank out it will be (relatively) easy to remove the swarf from the operation. It would seem that you have a wiring loom for a 'L' model which DOES require 2 wires to go to the tank-unit----1 wire for the 'low-fuel' light and the 2nd wire for the actual gauge. Whilst happy to be corrected by the electrical brains on the Forum, I think that if you can ascertain which wire does the 'low-fuel' light,you can leave the other wire disconnected (but insulated for safety).

You are correct Tom, the red wire is the low fuel light, the pink wire is the fuel gauge.
 
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