fuel gauge ohm range?

[H.M.X]

anybody know the ohm range for an XJ's fuel level sender?

and for extra credit, anybody know the ohm range for an AMC Spirit fuel level sender?

dan

[Comanche91]

You didn't mention the year, but on the 1991s the sender resistance is 105 ± 5 ohms. In 1991 they changed the polarity of the fuel gauge, but I almost certain the in-tank sender resistance dod not change. Don

[H.M.X]

'93 for the XJ.

'82 for the Spirit.

thanks,
dan

[H.M.X]

I got an answer from a friend not on this board. thought I'd share:

From the 1994 XJ TSM:
Empty 105 ohms
1/2 full 33 ohms
Full 5 ohms

From the 1981 Spirit TSM:
Empty 248 ohms
1/4 full 151 ohms
1/2 full 105 ohms
3/4 full 65 ohms
Full 31 ohms

He said if you have a TSM for your year vehicle, you should be able to look it up. Though I have yet to find the info in my 1979 TSM.

dan

[H.M.X]

and for those wondering, an electrical engineer I know recommended a 191-ohm resistor between the positive terminal of the fuel gauge and ground to use a Spirit gauge with an XJ sender.
dan