You may want to unplug gauge. Shorting is OK for quick test, but if you leave that way can melt the micro fine wire that drives needle (assuming DeLo gauge same as most others). Are usually resistors in circuit to protect gauge. Bill Robertson #5939 >--- In DMCForum@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote: > Forgive me Martin, but are you sure you're right on this? Other fuel > sending units I've worked with operate like this: > > As the float rises, resistance -decreases- (shorts) allowing more > power to the gauge, hence the needle rises. > > As the float falls, resistance -increases- (open) reducing power to > the gauge so the needle falls. > > So, as far as I understand it, I have a short, or full power to the > gauge because the needle pegs "full". > > If I had an open, the needle would always read "empty". > > I can see why it's confusing, because float goes up, resistance goes > down, and vice versa. It's opposite of what most people expect. > > When the sender is unplugged, the power wire is shorted to one of the > other wires somewhere, still sending a full voltage to the needle > because there is no sender to put any resistance on the line and > lower the needle. > > Now, how about those idiot lights? Which ones come on for test when > you put the key to "run"? :) > > > --- In DMCForum@xxxxxxxxxxxxxxx, Martin Gutkowski <webmaster@xxxx> > wrote: > > That's what it does when open circuit, hence unplugging makes no > difference > > > > cruznmd wrote: > > > > >2. Fuel gauge pegs full (wiring short. Does it even with sender > > >disconnected) > > > Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/M=244522.3707890.4968055.1261774/D=egroupweb/S=170512 6215:HM/A=1595053/R=0/SIG=124gf29oe/*http://ashnin.com/clk/muryutaitakenat togyo?YH=3707890&yhad=1595053> Click Here! <http://us.adserver.yahoo.com/l?M=244522.3707890.4968055.1261774/D=egroupm ail/S=:HM/A=1595053/rand=111570603> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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