fuel sending unit full/empty resistance?

[big66440]

Does anyone know the resistance full/empty value of the factory fuel sending unit? I'm in the market for an aftermarket gauge and was wondering if one of you guys can help me out,thanks in advance.

[jimoshel]

What year? There are differences between Renix and HO and '91-'92.

[big66440]

It's a short wheel base 89 Renix 4.0 automatic.

[Dechion]

Well, It just so happens that I picked up a JY sending unit off a renix today for install tomorrow. (Hopefully it works, I would love to know how much gas I have)

 

Assuming I remember when i'm out there working on it I can put a meter across it and check. Then again I won't be able to test it till Friday when the alternator get here. I know I am wanting to test both and compare them agains each other anyhow.

[big66440]

Thank you very much for the help,I guess were on the same boat as far as knowing how much gas we have left on the tank :cheers:

[big66440]

no one?

[Eagle]

The range for the Renix was 0 to 88 ohms. 0 = Empty, 88 = Full.

[big66440]

thank you very much :bowdown:

[big66440]

do you guys think a 0/90 gauge will work ok or will the 2 ohms throw off the gauge too much?

[HOrnbrod]

Should be close IF the polarity is correct.

[Eagle]

Should be close IF the polarity is correct.

Polarity is easy with an aftermarket gauge. If it reads backwards, switch the wires on the terminals.

[Dechion]

The range for the Renix was 0 to 88 ohms. 0 = Empty, 88 = Full.

 

Do you recall offhand were to take the reading? I am thinking from the violet wire at the fuel pump connector to ground, right? (I still havn't been out there to work on the MJ, both the XJ and my wifes minivan needed my attention this week)