Vincent, John
Thanks for your advice.
The loom at the moment is partially disconnected in that all the light fittings had been removed, the fuel tank had been taken off the car years ago and a replacement recently fitted, a local engineer who did some work on the tank tested the sender and said it was ok.
The control box is new and the fuses are fine, the fuel gauge is original and does not appear to have been disturbed. There is continuity between the gauge and the sender but as I said the voltage readings drop when the earth lead is connected, is that normal?
I would have expected to see something if only a flicker on the gauge, is it worth trying another gauge?
How does the system works as I can't get my head round the single wire between gauge and sender.
Also does anyone know if the same sender unit was used in the 405 as I just removed one from a 405 tank. Is there any way to test it off car, like wise the gauge itself.
We only recently reinstalled the loom to the back of the car through the new drivers sill, we established the feed to the sidelights almost straight away, I should have realised it was downhill all the way after that!
Geoff.
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