Hi all.
I refitted the fuel tank on my sapphire after an underside resto and found the fuel gauge would not work and the fuel light on the warning panel stayed on even after putting 20 ltrs of fuel in.

So last night I dropped the tank down a bit and removed the sender and checked the multi plug,earth post etc and all were in good condition.

I have a spare fuel tank so i removed the sender and moved the float by hand,the gauge went read the same as whatever position I put the float in.

So I fitted the old sender into the tank and turned the ignition on and the needle dropped right off the bottom of the gauge.

So I removed the sender and tried it out the tank and the gauge worked fine,so as a test I plugged in the original sender I removed and that worked fine too outwith the tank,so I reinstalled that sender to find it MADD the needle drop right if the gauge again.

So,the senders I gave both work fine out of the tank and as soon as I fit them in the tank they stop working.
all terminals are clean,no broken/nipped wires,both senders read accurately out if the tank.

Anybody seen this before?

Also,my fuel tank has been painted,if that makes any difference?

Thanks,lee