fuel level sending unit ohm range?

[DirtyDeeds]

does any one know what the ohm range should be for the fuel level sending unit from an 87 mj? 

[Green Mesa XJ]

I think for xj 84-90 the readings are

Full- 88 ohms

Empty - 0 ohms

I need to look it up again it's been a little while since I messed with the system.

I do know 91 Chrysler swap the reading , so empty read full on a 84-90 gauge

 

 

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[Green Mesa XJ]

Found this in a 1988 XJ electrical manual

Empty - 1 ohm

Half full - 44 ohm

Full - 88 ohm

 

It should be the same or similar for the MJ

 

 

 

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[DirtyDeeds]

I think for xj 84-90 the readings are

Full- 88 ohms

Empty - 0 ohms

I need to look it up again it's been a little while since I messed with the system.

I do know 91 Chrysler swap the reading , so empty read full on a 84-90 gauge

 

 

Sent from my iPhone using Tapatalk Pro

ok cool so for my aftermarket gauge ill use the 0-90 ohm wire that should work well enough

[DirtyDeeds]

I'm putting a new tank sending unit and switching to an inline pump. I'm going to put the pump on the factory circuit, but I'm running a whole new one for the sending unit. do you think i should add an extra ground grounding the tank to the body? i read somewhere that you should use the same ground point for the sending unit and the gauge

[Jeep Driver]

I'm putting a new tank sending unit and switching to an inline pump. I'm going to put the pump on the factory circuit, but I'm running a whole new one for the sending unit. do you think i should add an extra ground grounding the tank to the body? i read somewhere that you should use the same ground point for the sending unit and the gauge

Sending unit is grounded directly through the assembly, tank is strapped, straps ground the tank. 

 

I don't think the tank will need any further ground.

[89eliminator]

0-90ohm.  thats the sending unit i have in my fuel cell and the factory gas gauge works as it should in my 89.  

[DirtyDeeds]

my gauge is wired for 0-90 but its working backwards... but hey it works lol

[DirtyComanche]

my gauge is wired for 0-90 but its working backwards... but hey it works lol

 

If you get a HO sender it will fix it.  Or vice versa.