The coil on the relay should read about 70 ohms
In the up position, it should be 20 ohms. In the down position, resistance should be 220 ohms.
the fuel pump should be running around 40 ohms
87 to 90 YJ fuel guage sender is: 0 ohms = empty; 44 ohms = 1/2; 88 ohms = full
0 Ohms empty, 90 Ohms full.
20 ohms when empty, 220 ohms when full.
Usually 13 to 16
2o ohms to 200 ohms is what i'm getting on my 87 model
It is 90 ohms
Check out www.fordification.com/fuel-sending-units.htm I think you will find your answer there.
Full position (up) - 7 ohms Half tank (middle) - 33 ohms Empty position (down) - 95 ohms
full 10 ohmss empty 80 ohms
Sender Ohm Range