Usually is the input impedance of the load 10 times higher than the input impedance of the sender. So the sender's ohms is one tenth of the load.
0 Ohms empty, 90 Ohms full.
Check out www.fordification.com/fuel-sending-units.htm I think you will find your answer there.
2o ohms to 200 ohms is what i'm getting on my 87 model
About 2 when full and around 75 empty
Check the glow plugs (ohms) and wiring for shorts
full 10 ohmss empty 80 ohms
135 ohms new, and will function properly down to 114 ohms. The chart in the '86-'87 book shows: Empty=110 ohms +/- 7 ohms Full=3 ohms +/- 2 ohms 1/2 full= 32.5 ohms +/- 4 ohms
In the up position, it should be 20 ohms. In the down position, resistance should be 220 ohms.
With a multimeter. The easy way is to unscrew, disconnect and remove the sending unit from the tank for testing. Once removed, connect the multimeter to the chassis of the sending unit and the isolated stud that was wired to the fuel a gauge. Depending on where the sending unit's arm is positioned different resistance values will result.
Full position (up) - 7 ohms Half tank (middle) - 33 ohms Empty position (down) - 95 ohms
The gas sending unit for a 1987 Jeep Wrangler typically has a resistance value of around 0 to 90 ohms. This means that when the fuel tank is empty, the resistance is close to 0 ohms, and when the tank is full, it reaches approximately 90 ohms. However, it's always best to verify with a service manual or specific part documentation for accuracy.
78-84.8 ohms empty 4.3-5.8 Full