Fuel Sending Unit

[169INDY]

Hook up VOM (Volt-Ohm-Meter) either: to the Brown (Tan) wire from Top of sender Other: to the ring terminal on the Black ground lead.
Set Ohm Meter to Resistance, R times 1 (Rx1)

I like to validate performance of the wiring at same time.

[169INDY]

Float lowered.
Empty.
Nom Resistance: 0 ohms,

[169INDY]

Float Mid Level.
1/2 Tank
Nom Resistance: 45 ohms,

[169INDY]

Float Raised.
Full.
Nom Resistance: 90 ohms,

Theoretical Linear Tank curve, Actual Curve would be different.


Jim

[Kelley W King]

Jim, you might want to hang to the old Simpson multimeter. People might be collecting them soon. My comment about the full tank with gauge problems meant that the first thing I do when it does not seem to be working is put gas in it.

[169INDY]

LoL, The Simpson Series 260 is what I was trained on & am most comfortable with like an Old 4 speed.

I just wanted to add the "out of tank testing" reference for future searches and troubleshooting.

[Henry Cloutier]

Thank you Jim,

I printed out your ohm/vs gauge chart for reference. Once the new sender is here I'll check it before install.

You guys Rock!!

Hank

[169INDY]

You are Welcome.

I have a 68 that has been pegged (fuel gauge) for a year or so, just need to get it done myself (also)

JIM W

[Henry Cloutier]

Hi everyone,

Just a quick update, the fuel quantity issue was in fact the sending unit. It has been replaced finally and gage is functioning correctly.
Thanks for all your assistance. As usual you all are right on!

Hank