RE: IML: voltage limiter question

[Tim Durrer <tdkd99@xxxxxxxxx>]

Dick,

I have been reading the FSM on-line at our website and
yes there is another voltage limiter in the car. It is
located in the the Low Fuel Relay. When I work on the
car next weekend I will check to see if I have the
pulsating 5 volts on the blue wire connected to the
gauge. According to the wiring diagram this wire goes
from the gauge to the low fuel relay. The connection
to the tank is made through the back of the instrument
panel in the eight-way connector (also same color
wire) which is what confused me. 

Does anyone know the location of the Low Fuel Relay in
1973 Imperial? I think I can test it if I can find it.


Thanks!

Tim Durrer

--- Dick Benjamin <dickb@xxxxxxxxx> wrote:

>  
> But, where is the power coming from if the dash is
> out of the car?  The
> battery is still hooked to something - I'm still not
> understanding where the
> power is coming from.  What did I miss?
> 
> Dick Benjamin
> 
> -----Original Message-----
> From: mailing-list-owner@xxxxxxxxxxxxxxxx
> [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On
> Behalf Of Tim Durrer
> Sent: Saturday, August 19, 2006 7:47 AM
> To: mailing-list@xxxxxxxxxxxxxxxx
> Subject: RE: IML: voltage limiter question
> 
> You may be right about the meter It belonged to my
> grandfather so it has
> some years on it. I just tried my test lamp and with
> ignition on I am
> getting a steady bright light on that blue wire
> leading back to the tank. I
> ordered a new voltage limiter from Parts America
> that should be here on
> Monday. I plan to work on the car again next weekend
> so, I will let you know
> how it goes.
> 
> Thanks, for your help It is greatly appreciated.
> 
> Tim
> 
> --- Dick Benjamin <dickb@xxxxxxxxx> wrote:
> 
> > Well, I don't understand what is going on, but the
> pulsating voltage 
> > is coming from something, and the wire to the tank
> sender is one place 
> > it is supposed to be, so I suspect there is
> another voltage limiter 
> > somewhere else
> > in the vehicle.   The battery is hooked up to
> > something, or else you would
> > not see anything (unless your meter is telling you
> > lies.)
> > 
> > If you are seeing this with no battery hooked to
> anything, I suspect 
> > your meter is fooling you.
> > 
> > Dick Benjamin
> > 
> > -----Original Message-----
> > From: mailing-list-owner@xxxxxxxxxxxxxxxx
> > [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On
> Behalf Of Tim Durrer
> > Sent: Friday, August 18, 2006 9:33 AM
> > To: mailing-list@xxxxxxxxxxxxxxxx
> > Subject: RE: IML: voltage limiter question
> > 
> > No, I don't have a battery hooked to the voltage
> limiter. The limiter 
> > plugs into the back of the instrument panel which
> has been removed 
> > from the car.
> > Just for kicks I probed the disconnected blue wire
> that goes back to 
> > the tank and to my amazement there was a pulsating
> voltage on it with 
> > the ignition on!
> > 
> > It just didn't seem to ring true with what I was
> seeing on the wiring 
> > diagram to have voltage on that wire when the
> limiter was disconnected 
> > and removed from the car.
> > 
> > Tim
> > 
> > --- Dick Benjamin <dickb@xxxxxxxxx> wrote:
> > 
> > > All the voltage "limiter" needs to produce that
> pulsating voltage is 
> > > 12 volts on its input wire, and ground to its
> > mounting
> > > point, so it must have
> > > those somehow, even though it's sitting on the
> floor.
> > > 
> > > You do have a battery hooked to it, right?  
> > > 
> > > If not, consult your local magician for the
> secret
> > -
> > > you may have a source
> > > of perpetual motion staring you in the face. 
> > Apply
> > > for a patent, quick!
> > > 
> > > Dick  (Electrical problems: I love them too, but
> some are truly 
> > > confusin', even to me, and I've been chasing
> electrons around the 
> > > block for many, many years).
> > > 
> > > -----Original Message-----
> > > From: mailing-list-owner@xxxxxxxxxxxxxxxx
> > > [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On
> Behalf Of Tim Durrer
> > > Sent: Friday, August 18, 2006 6:43 AM
> > > To: mailing-list@xxxxxxxxxxxxxxxx
> > > Subject: RE: IML: voltage limiter question
> > > 
> > > Thanks, for your reply Dick.
> > >  So why am I getting the pulsating voltage on
> that blue wire with 
> > > the instrument cluster and voltage limiter out
> of the car sitting on 
> > > the floor of the garage?
> > > 
> > > I love electrical problems!
> > > 
> > > Tim Durrer
> > > 
> > > 
> > > --- Dick Benjamin <dickb@xxxxxxxxx> wrote:
> > > 
> > > > The pulsating voltage is correct, that is the
> > way
> > > > the voltage "limiter"
> > > > works. Its job is to produce approximately 5
> > volts
> > > > (average) to operate the
> > > > gauges, so it puts out 12 volts for about 42%
> of
> > > the
> > > > time, and 0 volts for
> > > > 58% of the time, that is what makes your meter
> > or
> > > > test light show a variable
> > > > voltage. Since the gauge display units are
> heat operated, they 
> > > > don't react quickly enough to be bothered by
> the pulsating 
> > > > voltage.
> > > > 
> > > > The situation you describe is what it should
> be, except that when 
> > > > you put the dash back in, something connected
> to the pulsating 
> > > > voltage wire is coming in contact with bare
> metal, somehow.
> > > > 
> > > > Dick Benjamin
> > > > 
> > > > -----Original Message-----
> > > > From: mailing-list-owner@xxxxxxxxxxxxxxxx
> > > > [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx]
> On Behalf Of Tim 
> > > > Durrer
> > > > Sent: Thursday, August 17, 2006 5:08 PM
> > > > To: mailing-list@xxxxxxxxxxxxxxxx
> > > > Subject: Re: IML: voltage limiter question
> > > > 
> > > > Hello all, I am also having gauge problems on
> my
> > > 73.
> > > > I
> > > > have read all the information on the website,
> studied the FSM and 
> > > > have concluded I also have a faulty voltage
> limiter. My problem 
> > > > started when the
> > fuel
> > > > gauge moved past full and the fuse protecting
> > the
> > > > gauge circuit blew. Upon replacing the fuse,
> it
> > > blew
> > > > again in a matter of seconds followed by a
> small puff of smoke out 
> > > > of the top of the dash. I have
> > pulled
> > > > the
> > > > instrument panel completely out of the car and
> I
> > > am
> > > > awaiting the delivery of the part.
> > > > 
> > > > My question: The blue wire that was attached
> to
> > > the
> > > > back of the fuel gauge according to the FSM
> > wiring
> > > > diagram goes back to the fuel tank sending
> unit which is grounded. 
> > > > Why does my test light come on and
> > > the
> > > > light pulsate on this wire when I turn on the
> ignition switch? In 
> 
=== message truncated ===


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