royAB Posted July 12, 2009 Share Posted July 12, 2009 Evening all, a little tech help please... Fuel gauge on my series started doing an odd trick today: Turn on motor & needle rises to show level (currently 1/2 tank) then, after a couple of seconds, needle sinks slowly back to zero. Turn motor off & back on again, repeat performance. .. Any ideas as to the cause in advance of dismantling things much appreciated. Thanks in advance Quote Link to comment Share on other sites More sharing options...
rtbarton Posted July 12, 2009 Share Posted July 12, 2009 Evening all, a little tech help please... Fuel gauge on my series started doing an odd trick today: Turn on motor & needle rises to show level (currently 1/2 tank) then, after a couple of seconds, needle sinks slowly back to zero. Turn motor off & back on again, repeat performance. .. Any ideas as to the cause in advance of dismantling things much appreciated. Thanks in advance Whish Series is it? The gauges are different between SIII and earlier vehicles. Quote Link to comment Share on other sites More sharing options...
royAB Posted July 12, 2009 Author Share Posted July 12, 2009 Indeed, slight oversight there - SIII Quote Link to comment Share on other sites More sharing options...
rtbarton Posted July 12, 2009 Share Posted July 12, 2009 Sounds like the regulator on the back of the speedo is playing up. First thing to check is the easy bits, i.e. make sure all the connections are sound. Quote Link to comment Share on other sites More sharing options...
royAB Posted July 12, 2009 Author Share Posted July 12, 2009 Thanks RT. Voltage regulator was going to be my 1st port of call - easiest place to get to! Quote Link to comment Share on other sites More sharing options...
Guest otchie1 Posted July 12, 2009 Share Posted July 12, 2009 Thanks RT. Voltage regulator was going to be my 1st port of call - easiest place to get to! Wisdom has it that it's best replaced by an electronic unit from your local Tandy. 10V IIRC. Quote Link to comment Share on other sites More sharing options...
rtbarton Posted July 12, 2009 Share Posted July 12, 2009 I think you can get electronic ones in the same package as the original to make life easier. Quote Link to comment Share on other sites More sharing options...
TeriAnn Posted July 14, 2009 Share Posted July 14, 2009 Check the quality of the gauge to fuel tank and fuel tank to ground connections while you are checking the voltage to fuel gauge connections per the earlier posts. You could just be dealing with a very poor electric connection. I don't recall your vehicle year, but the trucks factory wired for positive earth didn't have voltage regulators (at least in the States) so I thought I would provide something else to check. Quote Link to comment Share on other sites More sharing options...
Jon White Posted July 17, 2009 Share Posted July 17, 2009 Wisdom has it that it's best replaced by an electronic unit from your local Tandy. 10V IIRC. I've had nothing but trouble with electronic relacements and have gone back to theold dinosaur technology as it works and is reliable! Jon Quote Link to comment Share on other sites More sharing options...
Gazzar Posted July 17, 2009 Share Posted July 17, 2009 I've had nothing but trouble with electronic relacements and have gone back to theold dinosaur technology as it works and is reliable!Jon Ditto, and the old Lucas one can be adjusted. If you are brave enough to pry it open, you can probably fix it too! G. Quote Link to comment Share on other sites More sharing options...
royAB Posted July 17, 2009 Author Share Posted July 17, 2009 Got, presumably, an 'old style' one from Paddocks (Britpart?) and will see what happens tomorrow. Must say, I too like 'fixable' bits in a truck - particularly where electrickery is involved... Thanks all Quote Link to comment Share on other sites More sharing options...
rtbarton Posted July 17, 2009 Share Posted July 17, 2009 Got, presumably, an 'old style' one from Paddocks (Britpart?) and will see what happens tomorrow. Must say, I too like 'fixable' bits in a truck - particularly where electrickery is involved... Thanks all Quote Link to comment Share on other sites More sharing options...
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