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Another Fuel Gauge Question

Another Fuel Gauge Question

AeroMoto

Jeeper
Posts
110
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Location
Fort Collins, CO
Vehicle(s)
1973 CJ5, AMC 360, 4" Rancho lift
New Omix-Ada gauge. Took the speedo out to bench test the new gauge. So the new gauge has the following measurements:

S to ground= 54
S to I = 21.3
S to A = 21.3
I to A = 0
I to ground = 34
A to ground = 34

So it looks like the gauge is consistently reading 16 ohms to low to ground. So the question I have is should I solder a 16 ohm resistor in line with the fuel sender to get it reading correctly?

Option 1: I made a circuit with my battery charger and a 10 (closest I had to 16) and a 22 ohm resistor in series. I got the (new) half tank measurement to read about 3/4 of a tank. So am I on the right track?

Option 2: "Recalibrate" the fuel sender to have 26 ohms at full, 39 ohms at half, and 89 ohms at empty?

On a related note, I've got a dedicated ground wire to the dash and the fuel sender, so that's not the problem. Plus I was bench testing it so it woas out of the dash.

Anyone else have any experience with this?
 

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