fuel gauge problem

[jamesbray]

my nova started life as a 1990 mk2 flare 1.2 carb and still has same tank and fuel sender

new dash/clocks are out of a mk2 sri 4 dial with outer ring white and led fuel low light.

since I have fitted the clocks my fuel gauge has a mind of it own, most the time I have a full tank when relly there is only a tenner in the tank.

plz help

[millworm]

The clocks should work fine, either there is a burnt out track on the printed curcit board or the resistor on the back Is shagged