TESTING THE FUEL GAUGE SENDER
The first step is
to test the gauge, wiring, and that the tank is earthed ok and all proves to be
ok on the car. The next step is to
see if there is a problem with the sender unit.
Once the top of the sender unit is
removed, preferably through the removable plate in the floor if you have one,
the sender unit itself is then removed, which may prove to be a bit of a
challenge as some of the screws may need to be drilled out and replaced. The
screws are the same as Meccano screws 5/32" Whitworth.
The biggest
challenge in testing the gauge and sender unit is to hold them temporarily to
test the movement of the sender unit, so a piece of wood is utilised. If you
have removed the fuel tank, it is prudent to re-fit the sender and test the
system before replacing the tank, remembering to apply a good earth – just in
case!
If you are using
fuel resistant sealant between the sender and the tank this may be blocking the
earth on the sender unit to the tank, so a wire needs to be added to the top of
the unit back to the car.
Douglas Alderson, DA7C