Weird fuel gauge, level sender problem

[craigieeb]

The fuel gauge has been acting up for a while in the touring,
I've been just going for fuel when the light comes on,
so I thought the sender unit might be faulty,

I pulled the connectors off today and the needle dropped right off,

but when i pulled the sender unit out, there seemed to be at least a quarter of a tank in there
(judging by the level in the tank and you could see the depth on the residue on the sender it's self)


I thought the "light" was controlled via the other sender, on the fuel pump side..?


anyway,,, so I put the same sender unit back in, plugged in the wires and the needle moved to my surprise, to just under the last mark on the gauge..
but the light is still on :/


so, question is..

Are both level senders at fault?

or

Is the single level sender faulty?

[Brianmoooore]

The tank has a level sender in each half, that work together to give an average for the reading on the gauge.
There is no reason to expect the levels in both halves of the tank to be the same.
The low level light is controlled by a switch built into the RH sender, and uses the same float inside the canister.
If there is a quantity of fuel in the RH side, and the low level light is on, then that sender is faulty, whatever the gauge says.
All E30 RH level senders are the same (except early external pump stuff.)

[craigieeb]

Gotcha.

cheers