Test low fuel light (without running out of gas)

[nzer]

I'd like to test my low fuel light - never seen it come on - but the gauge has been right empty. Any electrical test I can do? (unplug the sender etc etc) What signal does it look for.

Its a 84 323 VDO instrument cluster if that helps.

Cheers

[Jordan]

unplug the sender.

[nzer]

unplug the sender.

Did that - fuel gauge doesn't move and no light.

Replace the bulb?

[Erick]

Drive w/ a gallon container w/ fuel in your trunk.