RE: IML: voltage limiter question

["Dick Benjamin" <dickb@xxxxxxxxx>]

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 
> > > reading the wiring diagram, current should flow from the limiter, 
> > > through the gauge to this blue wire, to the sending unit and then 
> > > to ground. If
> I
> > > am
> > > reading this right why am I getting voltage on
> > this
> > > wire if the dash is completely out of the car?
> > Could
> > > I
> > > have a short somewhere else? Incidentally, the
> > fuse
> > > now holds with instrument panel out of the car.
> > > 
> > > Help!
> > > 
> > > Tim Durer
> > > 73 Lebaron
> > > 
> > > --- stephen dilley <stephendilley@xxxxxxx>
> wrote:
> > > 
> > > > 
> > > > hi, i am back from a hot rod weekend here in
> in
> > > the
> > > > uk, whilst having
> > > > problems with failed gauges and high reading
> oil
> > > > pressure- now smoke came a
> > > > wafting out of the indicator stalk hole on my
> 60
> > > > crown. ??? still works
> > > > mind. the car is a star and wish to keep it so
> > ...
> > > > am using it for a wedding on saturday just
> hope
> > > she
> > > > dont go up in flames !!! 
> > > > how do you get to the cluster??? for limiter?
> > > should
> > > > i just fit some remote
> > > > modern gauges and leave well alone ? back to
> the
> > > > indicator smoke , wots all
> > > > that about? also i have a power drain
> somewhere
> > > > which leaves a low glow on
> > > > the handbrake on light. unable to locate
> source,
> 
=== message truncated ===


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