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62kellison Samba Member
Joined: March 28, 2018 Posts: 513 Location: mass
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Posted: Mon Jun 11, 2018 2:42 pm Post subject: aftermarket 0-90 ohm fuel sender, to a vw gas gauge?? |
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hey guys I was going with a fuel tank (aftermarket).it has a 0-to-90 ohm fuel sender in the tank 2 wires.can I use this with a stock 74 vw beetle speedometer with the built in gas gauge??.do I need any other parts to make it work?.or do I have to use a new 90 ohm gas gauge??. |
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rugblaster Samba Member
Joined: March 31, 2016 Posts: 1161 Location: San Angelo, Texas
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Posted: Mon Jun 11, 2018 3:03 pm Post subject: Re: aftermarket 0-90 ohm fuel sender, to a vw gas gauge?? |
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you could use a resistor to get the empty reading down a bit to 75 ohms.....Full is 0 ohms........some of the sending units have adjusting tabs on them. _________________ '69 Karmy, '69 Camper, Meyers clone, '65 drag bug, 10.78 @ 128 (sold it) '51 Dodge farm truck,
'09 MB E350 '18 MB E400, '65 Plymouth Valiant convertible and a '19 Ford F250 King Ranch (nicer, but dirty, farm truck)
VWoA factory trained line tech 75 till 90 or so
ASE Master Certification
VWoA Assoc. of Quality Technicians inductee (One of 25 in the five state southwest region)
La Confrerie des Chevaliers du Tastevin (San Angelo Chapter)
TCU ......GO FROGS!!!!!! |
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62kellison Samba Member
Joined: March 28, 2018 Posts: 513 Location: mass
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Posted: Mon Jun 11, 2018 5:36 pm Post subject: Re: aftermarket 0-90 ohm fuel sender, to a vw gas gauge?? |
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that is pretty much Chinese to me rugblaster.i just know the tank I am getting is 0 to 90 ohms.so I take it what u are saying is the vw speedos gas gauge takes lower/ higher than 90 ohms?.so I use a resistor to bring sender down some?.sorry.the whole ohm and gas gauge stuff is new to me.i am mediocre when it comes to wiring.i just understand the basics.getting into ohms and resistors is beyond me.temporarily it seems.sorry trying to understand it so I don't fry stuff. |
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62kellison Samba Member
Joined: March 28, 2018 Posts: 513 Location: mass
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Posted: Mon Jun 11, 2018 5:39 pm Post subject: Re: aftermarket 0-90 ohm fuel sender, to a vw gas gauge?? |
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now I got what u were saying empty tank reading is 75 ohms,and a full tank reads 0 ohms.so it is compatible with my vw gauge?. |
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62kellison Samba Member
Joined: March 28, 2018 Posts: 513 Location: mass
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Posted: Mon Jun 11, 2018 5:41 pm Post subject: Re: aftermarket 0-90 ohm fuel sender, to a vw gas gauge?? |
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is there a place I could find a wiring schematic so I know how to wire it up?.thanks guys. |
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62kellison Samba Member
Joined: March 28, 2018 Posts: 513 Location: mass
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Posted: Mon Jun 11, 2018 5:49 pm Post subject: Re: aftermarket 0-90 ohm fuel sender, to a vw gas gauge?? |
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I guess the question actually is whats the stock ohms of a 1974 vw beetle gas gauge and what can I do to make it compatible to my 0 to 90 ohm sending unit.maybe I should of asked it that way?.because I do not understand it.lol |
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jspbtown Samba Member
Joined: January 27, 2004 Posts: 5152
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jspbtown Samba Member
Joined: January 27, 2004 Posts: 5152
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62kellison Samba Member
Joined: March 28, 2018 Posts: 513 Location: mass
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Posted: Tue Jun 12, 2018 3:51 am Post subject: Re: aftermarket 0-90 ohm fuel sender, to a vw gas gauge?? |
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thank u jspbtown. |
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