I have an old split face, rear mount Stewart Warner gauge that I would like to use in my 29 roadster. This gauge is most likely 6 volt, but I will be running a 12V system. I have a sending unit, that reads 1.5 ohms empty and 92.5 ohms in the "full" position. The sending unit is newer and I was wondering if it was possible to make these two work together. The ammeter is another concern, since I'm running 12V. BTW, anybody know what year this gauge is and what it came out of? Thanks.
You can run individual voltage reducers on both gauges and that should make them work on your 12V system. Vintique, MACS, Eary Ford Store - all have something that will work.. I think that gauge is early 1930's Auburn, ESSEX ???
I can't tell you which sending unit you need but it must match the gauge. Once you have the correct sending unit for the gauge just use a runtz to supply the gauge with 6Vs. I got mine from EBAY. Like said above the ammeter doesn't care what voltage you are using. If it should read backwards, just swap the wires on the terminals and all will be fine. An ammeter is just a flow indicator. The amount of flow and the direction of said flow. When everything is right it should show a flow towards the battery when it is charging. If the charging system is not working then the flow will be out of the battery.
Thanks guys. Does anybody know what the early SW gauges need in the "ohm department"? Is there a way to measure that gauge for that?
Stewart Warner gauges have been 240 to 33 ohms since the beginning of the 12 volt era. Not sure if that works the same for 6 volt.
Hi, I've sent you a message before. The Part# 94866. Has a 12V next to it. I have several S/W Duplex gauges. Some are 12V an were made without Shunts & Some are 12Volt with Shunts. The External 12 Volt Shunts Have a Clip attached, & a the Shunt looks LiKE a Double Metal Washer filled with resistor material. This Clip Has a Threaded Stud Bolt. Some of These Gauges have a Metal Square With a Metal Spring Coil. these types of Shunt are 24Volt. These would Be for military Applications. You remove this shunt, & it's 6volts. I'd call Williamsons in Fort Smith Ark. They are good People, that repair these S/W Gauges. An can tell You More Info. Call me if you need to ask Any Questions! Dereald Millsap (903) 952-1933. Posted using the Full Custom H.A.M.B. App!
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