Anyone got any Idea what the ohms for a 87 wrangler fuel level sender is, I am trying to get some gauges and i need a fuel gauge but i need to know the resistance of the old gauge and i haven't got any 12 volt power to figure it out.
With an ohmmeter check the resistance between the round sender post (pink wire) and ground.
It should be:
* 73 ohms Empty
* 23 ohms at 1/2 tank
* 10 ohms Full
If the resistance falls in this ballpark (depending on how much gas you have in the tank), then the sending unit is fine.
If it shows infinitely HIGH resistance, then the sending unit could be bad OR the wire from the tank to the gauge could be open.
YJ readings are backwards, ending near 90 ohms at full.
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