Pooshoe Posted October 11, 2021 Report Posted October 11, 2021 (edited) I recently did the 12 V conversion to my 47 Plymouth And trying to use my stock fuel gauge. An universal gas tank was put in prior to me buying it with what looks like aftermarket sending unit as well, if that is the case and it’s not a stock sending unit well I be able to run the stock gas gauge with the after market sending unit by running a runts resistor? Or because the sending unit is not made for the gas gauge does that mean I need an after market gauge? thanks guys! Edited October 11, 2021 by Pooshoe Quote
Adam H P15 D30 Posted October 11, 2021 Report Posted October 11, 2021 If the sender has the incorrect resistance, it won't work on 6v or 12v. My fuel gauge read the same on both 6v and 12v, I added a Runtz resistor because they are cheap and probably nicer to the gauge. Quote
Pooshoe Posted October 12, 2021 Author Report Posted October 12, 2021 This is the sending unit i have in the car . When I have to open out to figure out if it’s stock? Quote
Pooshoe Posted October 12, 2021 Author Report Posted October 12, 2021 I removed the sending unit and ohmed it out and if my correct, found the sweep goes from 100 to 0. Not sure if this will work with the stock gauge or I will need to order the correct sending unit for the tank. Is this correct? Quote
Adam H P15 D30 Posted October 14, 2021 Report Posted October 14, 2021 I do not know the factory sender resistance values to match the gauge. If you can find the values, compare them with your sender and you will probably find your issue. Quote
Pooshoe Posted October 14, 2021 Author Report Posted October 14, 2021 Thanks dude , I’m dyslexic and there is so much info on this website it’s Daunting when I ask in the forums people say why don’t you read other threads on the topic? I have a third grade reading level it’s a lot of info to Process Quote
Adam H P15 D30 Posted October 14, 2021 Report Posted October 14, 2021 Maybe someone here can post the fuel sender values from the shop manual here and help a guy out? Quote
chrysler1941 Posted October 15, 2021 Report Posted October 15, 2021 18 hours ago, Adam H P15 D30 said: Maybe someone here can post the fuel sender values from the shop manual here and help a guy out? ok ? Quote
James_Douglas Posted October 16, 2021 Report Posted October 16, 2021 Just be happy you do not have the Desoto-Chrysler two wire sending units and gauges! Quote
junkers72 Posted October 16, 2021 Report Posted October 16, 2021 53 minutes ago, James_Douglas said: Just be happy you do not have the Desoto-Chrysler two wire sending units and gauges! A 1947 plymouth factory fuel gauge is the 2 wire to sender + 1 wire from ignition switch for power like the same era Chrysler desoto & dodge. 1 Quote
later Posted October 17, 2021 Report Posted October 17, 2021 What ohm Runtz resistor is used with a conversion from 6 to 12 volts? Quote
Sniper Posted October 17, 2021 Report Posted October 17, 2021 there is only one https://www.speedwaymotors.com/Speedway-Runtz-12-Volt-to-6-Volt-Voltage-Reducer,2374.html Quote
later Posted October 17, 2021 Report Posted October 17, 2021 16 hours ago, Sniper said: there is only one https://www.speedwaymotors.com/Speedway-Runtz-12-Volt-to-6-Volt-Voltage-Reducer,2374.html Thanks for the link. Ordered today. 1 Quote
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