Re: Instrument Gauges

[Bob Crockett <bcrockett1492@xxxxxxxxxxxxx>]

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> Tom Duross wrote:
>
> <snip>
>
> > > The temp and fuel gauges on my 64 Belv don't work and I ran out of >gas 
> > > yesterday (again).
>
> <snip>
>
> > > Is there some way of checking with a hot wire off the battery?  A 
> > > multimeter?
> > > I'm willing to try anything, any suggestions are welcome.
>
> <snip>


Tom, you can check the gauges by jumping the sender side of each gauge 
to ground.  The gauge should rise to full scale or a bit past the full 
or hot mark.  Don't hold it like that for too long.  Since it is the two 
gauges that are misbehaving, I would suspect the instrument voltage 
regulator.  My Darts and my motorhome have the regulator in the gas 
gauge, and this creates a challenge I haven't addressed yet.  Lots of 
mopars have used a seperate regulator that can be replaced easily or 
eliminated and replaced with a much better circuit as shown in an 
article by Richard Ehrenberg at:

> http://www.allpar.com/history/mopar/electrical2.html

I will shortly be working on a fix for the clusters with the regulator 
in the gas gauge.  I have several of those clusters and the principle is 
the same as the fix in the Ehrenberg article, but the physical doing of 
the deed will take a bit of fabrication.  I'm a retired radio station 
engineer, and I know _what_ needs to be done, but haven't figured _how_ 
just yet.

I'm still trying to figure out what ever posessed Ma Mopar to put the 
darn regulator inside the gauge!  They probebly weren't planning on the 
cars lasting so long!

BC

P.S. your Factory Service Manual should have a circuit diagram showing 
where your instrument voltage regulator is located.  If it is not inside 
the gas gauge, Ehrenberg's fix is simple and permanent.

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