fuel gauge sending unit test

[captmello]

this should be an easy one for you "smart guys".
long story short, Bobcat quit, seemed to run out of fuel. narrowed it down and figured out it was a broken pickup tube.
pulled the tank, sure enough. The fuel gauge hasn't worked it 10 years so I thought since it's out, fix it.
Can you guys tell me how to test the sender? I've got my multimeter ready.
Naturally I can't attach my photo, but it's your typical two wire with the float and one wire going down into the tank where the float arm pivots.
Thanks

 

[alldodge]

Not sure if Bobcat uses same as USA standard since Doosan which is South Korea

The typical 2 wire sender is one goes to gauge sense post and other goes to ground.

Connect to gauge, turn power ON and move float up/down to see if gauge moves. If gauge doesn't move, ground the float sender wire to see if gauge pegs full

 

[captmello]

Not sure if Bobcat uses same as USA standard since Doosan which is South Korea

The typical 2 wire sender is one goes to gauge sense post and other goes to ground.

Connect to gauge, turn power ON and move float up/down to see if gauge moves. If gauge doesn't move, ground the float sender wire to see if gauge pegs full

thanks for the reply AD. when the sender was hooked up, the gauge wasn't giving any reading.
Is there a way to test the sender using a multimeter?

 

[dingbat]

Is there a way to test the sender using a multimeter?

Wire colors vary by unit, but set meter to ohms and move the float up and down. Reading should fluctuate high to low while moving the float up and down. The amount of fluctuation varies by the “standard” followed.

Found out the other day (working on my own equipment) that some senders operate off voltage. Needed a 4.0v to 4.5v sender

 

[captmello]

Wire colors vary by unit, but set meter to ohms and move the float up and down. Reading should fluctuate high to low while moving the float up and down. The amount of fluctuation varies by the “standard” followed.

Found out the other day (working on my own equipment) that some senders operate off voltage. Needed a 4.0v to 4.5v sender

this test worked well. I had good steady resistance change through the motion of the float, so I think the sender is good.
I'll have to check the wiring once I get back to the machine.
thanks!