david johnson Posted June 10, 2012 Report Share Posted June 10, 2012 Can anybody advise how I should wire the voltage stabiliser for the temp guage and fuel guage on a alternator sidescreen car. The stabiliser has four connections. Two below the word top, and two below the letter R. Presumably I need power in at one and two connections one to each dial, but which connections. Thanks David. Quote Link to post Share on other sites
Icarus60 Posted June 10, 2012 Report Share Posted June 10, 2012 David As I am sure you know originally there was no voltage regulator on the car but if yours is like the one I have then the input is the plain spades (Male) and the output is the spade receptacles (Female). The casing is earth. With greater than 12V across input and earth expect output and earth to pulse on/off in slow time. The device is not polarity sensitive unlike any solid state devices which are now available to replace the old technology. Regards Rog Quote Link to post Share on other sites
david johnson Posted June 10, 2012 Author Report Share Posted June 10, 2012 Thanks Rog. Mine though has all male fittings, as MGB type. Presumably as not polariity sensitive it can be wired either way round. David. Quote Link to post Share on other sites
angelfj Posted June 10, 2012 Report Share Posted June 10, 2012 (edited) Can anybody advise how I should wire the voltage stabiliser for the temp guage and fuel guage on a alternator sidescreen car. The stabiliser has four connections. Two below the word top, and two below the letter R. Presumably I need power in at one and two connections one to each dial, but which connections. Thanks David. David: the side screen cars had no stabiliser. The fuel gauge was designed to operate (more or less) at 12VDC and the temperature gauge was a direct reading Bourdon tube type. However, if you look below you will see the correct connections for a 10VDC fuel and temperature gauge as fitted to a TR4 or 4A with stabiliser. Edited June 10, 2012 by angelfj Quote Link to post Share on other sites
david johnson Posted June 10, 2012 Author Report Share Posted June 10, 2012 Thanks for the advice. Mine is wired as a tr4 and the capillary thermostadt has been changed for an electric one. Regards David. Quote Link to post Share on other sites
Icarus60 Posted June 10, 2012 Report Share Posted June 10, 2012 David Sounds like you are fixed up now but just a small point to clarify.The old thermal unit like the type you have is not polarity sensitive but it must be wired to the input and earth and not output and earth , i.e. this does matter. If you put 12v across output and earth you would have a short. What I meant it does not matter if your car is -ve earth or +ve earth. Regards Rog Quote Link to post Share on other sites
ians Posted June 11, 2012 Report Share Posted June 11, 2012 I have a similar situation with the original temperature gauge having been replaced with an electrical sensor. Clearly the temperature gauge needs to be fed from the voltage regulator. However I have a question - if the original fuel gauge is still fitted and was designed to operate off 12volts (all be it unregulated) will this still work properly if it is now fed by a10volt regulated supply as shown in the angelfj's circuit diagram? Quote Link to post Share on other sites
RogerH Posted June 11, 2012 Report Share Posted June 11, 2012 Hi Ian, your gauge needs 12V if you stick 10V across it it will not deflect fully. You can feed 10V to the thermogauge from the stabiliser, and 12V across the Fuel gauge. Roger Quote Link to post Share on other sites
ians Posted June 11, 2012 Report Share Posted June 11, 2012 Thanks Roger that's what I thought but I just wanted to check. Quote Link to post Share on other sites
angelfj Posted June 11, 2012 Report Share Posted June 11, 2012 Hi Ian, your gauge needs 12V if you stick 10V across it it will not deflect fully. You can feed 10V to the thermogauge from the stabiliser, and 12V across the Fuel gauge. Roger Roger, with a 10 volt supply wouldn't he consume less petrol??? Sorry, I'm just leaving. Quote Link to post Share on other sites
RogerH Posted June 12, 2012 Report Share Posted June 12, 2012 if only. Roger Quote Link to post Share on other sites
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