Posted By: 300by500
Ohm range for Mopar fuel gauge sending units? - 07/27/08 10:08 PM
I'm looking for an aftermarket fuel level gauge, but I need to know what the ohm range should be for it to work in my '69 Barracuda. Anyone know? 
Ohm range for Mopar fuel gauge sending units?
Posted By: RodStRace
Re: Ohm range for Mopar fuel gauge sending units? - 07/27/08 10:47 PM
Posted By: BDW
Re: Ohm range for Mopar fuel gauge sending units? - 07/28/08 12:47 AM
I always thought 5-10 ohms was the low side.
0-2 ohms would certainly explain why my 5V solid state version regulator couldn't supply enough current.
5V/1ohm = 5amps!
0-2 ohms would certainly explain why my 5V solid state version regulator couldn't supply enough current.
5V/1ohm = 5amps!
Posted By: goldduster318
Re: Ohm range for Mopar fuel gauge sending units? - 07/28/08 12:58 AM
Autometer claims 73 ohms empty, 10 ohms full
Posted By: 300by500
Re: Ohm range for Mopar fuel gauge sending units? - 07/28/08 01:15 AM
Quote:
Autometer claims 73 ohms empty, 10 ohms full
Yep.
http://store.summitracing.com/partdetail...mp;autoview=sku
Thanks for the help, y'all!
Posted By: MoparMarq
Re: Ohm range for Mopar fuel gauge sending units? - 07/28/08 04:17 AM
Moparaction.com might have some more info, but IIRC, then sending units in Mopars for fuel, oil, and temp were supposed to have 10 ohms for top of the scale, and 90 ohms for bottom of the scale.
Others more knowledgeable may chime in.
Keep us posted and pic'd on the Dakota junction box install...
-Marq
Others more knowledgeable may chime in.
Keep us posted and pic'd on the Dakota junction box install...
-Marq
Posted By: Anonymous
Re: Ohm range for Mopar fuel gauge sending units? - 07/28/08 12:18 PM
Quote:
Moparaction.com might have some more info, but IIRC, then sending units in Mopars for fuel, oil, and temp were supposed to have 10 ohms for top of the scale, and 90 ohms for bottom of the scale.
Others more knowledgeable may chime in.
Keep us posted and pic'd on the Dakota junction box install...
-Marq
nope, its 10 and 73 ohms. the new fuel sending units they are selling everywhere measure 10 and 90 though....
Posted By: hydro
Re: Ohm range for Mopar fuel gauge sending units? - 07/28/08 02:55 PM
Yup, Its "10 to 73" but that's not all. The range is not linear across the sweep and the top and botton resistance can cause different results with different gauges. I have a fuel cell with the aftermarket sender (tube type) and it is nowhere near accurate. I'm on my 4th try at geting this thing re-calibrated so that the gauge reads somewhere near how much fuel is actually in the tank.
Posted By: Saint Crispan
Re: Ohm range for Mopar fuel gauge sending units? - 07/28/08 05:47 PM
Well, you could always do it the hard way...
Put a gallon in, mark a line...put a gallon in...mark a line...
Might be long and tedious but durned accurate!
Put a gallon in, mark a line...put a gallon in...mark a line...
Might be long and tedious but durned accurate!
Posted By: hydro
Re: Ohm range for Mopar fuel gauge sending units? - 07/28/08 08:06 PM
With the linear resistance sender a gallon can sweep the instrument panel gauge almost 1/4 tank!
Posted By: ddartdude
Re: Ohm range for Mopar fuel gauge sending units? - 07/28/08 10:59 PM
Just checked the Miller C-3826 gauge checking tool and it's ------
L = 73.7 Ohms
M = 23.0 Ohms
H = 10.2 Ohms
M would be 1/2 a tank of gas.
L = 73.7 Ohms
M = 23.0 Ohms
H = 10.2 Ohms
M would be 1/2 a tank of gas.