Fuel gauge causing fuse to blow

[Pucketsport]

I have just finished rebuilding a 57 Moggie and have fitted a new wiring harness. When I turn on the ignition the fuse that supplies power to the green wires blows. When I disconnect the gauge green wire and the green/brown wire the fuse does not blow. Does this mean my gauge is broken or the fuel sender unit is broken and causing a short. Also there doesnt seem to be an earth connection on the tank sender unit, surely this needs to be earthed? Is there a quick and dirty way to check if the gauge or sender are faulty using a multimeter ?

[geoberni]

Well first off, lets put a comment here that to save a lot of confusion, all replies should be in one place, over on the OTHER post you've made

viewtopic.php?f=11&t=69123

Clearly not an accidental double post as the wording is different

[simmitc]

Good point, I'm locking this thread.