You're telling me it's in the gauge it's self, or a bad connection
on that instrument panel. Is full the ignition off rest position?
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

William Oliveri wrote:
>
> Hi all,
>
> I was working through my FSM trying to discover why my fuel guage is
> maxing out for a while and then coming back down after I tap on the guage.
> One of the steps says to check the battery ground. That is, from the
> positive lead there is another wire coming from it which should be grounded
> to something. I have one of those leads but it was never a ground as far as
> I can remember. Looks like it was attached to something with an inline
> fuse.
>
> Is this right? Should I be grounding the battery with this wire?
>
> thanks in advance,
>
> bill

 

That is a sticky mechanical voltage regulator inside the gas gauge. The
gas and temp run on 5 volts.

When the points stick in the regulator, you get a 12 volt spike. This
'will' burn out the gauges in short order.

Here is a good link on troubleshooting the gauges:

http://www.monsterslayer.com/jeep/Gauges.htm

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> Yeah, when I start it up it's fine. Usually I find after I put more than
> 10.00 worth of gas in it at a certain point on the way down both the
> Temperature Guage and the Fuel Guage max out all the way to the right. Then
> if I tap it (sometimes) it will go back down and be ok. Other times it will
> go down by itself.
>
> "L.W. (ßill) ------ III" <----------@***.net> wrote in message
> news:3F6D4634.D99405D2@***.net...
> > You're telling me it's in the gauge it's self, or a bad connection
> > on that instrument panel. Is full the ignition off rest position?
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > William Oliveri wrote:
> > >
> > > Hi all,
> > >
> > > I was working through my FSM trying to discover why my fuel guage is
> > > maxing out for a while and then coming back down after I tap on the
> guage.
> > > One of the steps says to check the battery ground. That is, from the
> > > positive lead there is another wire coming from it which should be
> grounded
> > > to something. I have one of those leads but it was never a ground as
> far as
> > > I can remember. Looks like it was attached to something with an inline
> > > fuse.
> > >
> > > Is this right? Should I be grounding the battery with this wire?
> > >
> > > thanks in advance,
> > >
> > > bill

 

That is a sticky mechanical voltage regulator inside the gas gauge. The
gas and temp run on 5 volts.

When the points stick in the regulator, you get a 12 volt spike. This
'will' burn out the gauges in short order.

Here is a good link on troubleshooting the gauges:

http://www.monsterslayer.com/jeep/Gauges.htm

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> Yeah, when I start it up it's fine. Usually I find after I put more than
> 10.00 worth of gas in it at a certain point on the way down both the
> Temperature Guage and the Fuel Guage max out all the way to the right. Then
> if I tap it (sometimes) it will go back down and be ok. Other times it will
> go down by itself.
>
> "L.W. (ßill) ------ III" <----------@***.net> wrote in message
> news:3F6D4634.D99405D2@***.net...
> > You're telling me it's in the gauge it's self, or a bad connection
> > on that instrument panel. Is full the ignition off rest position?
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > William Oliveri wrote:
> > >
> > > Hi all,
> > >
> > > I was working through my FSM trying to discover why my fuel guage is
> > > maxing out for a while and then coming back down after I tap on the
> guage.
> > > One of the steps says to check the battery ground. That is, from the
> > > positive lead there is another wire coming from it which should be
> grounded
> > > to something. I have one of those leads but it was never a ground as
> far as
> > > I can remember. Looks like it was attached to something with an inline
> > > fuse.
> > >
> > > Is this right? Should I be grounding the battery with this wire?
> > >
> > > thanks in advance,
> > >
> > > bill