Re: IML: 59 fuel gauge problem

[<mtnose@xxxxxxxxxxxxx>]

   Has anyone replaced this regulator on a 1959 or close? If so how 
difficult is it and are their any tricks to it?
Marty Trendler

----- Original Message ----- 
From: "Joe Strickland" <jwstrick426@xxxxxxxxxxxxxx>
To: "Imperial Mail List" <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Friday, June 08, 2007 5:19 AM
Subject: IML: 59 fuel gauge problem


> From: mtnose@xxxxxxxxxxxxx
>
>
> My fuel gauge was going all the way to full, so I had my extra sending
> unit rebuilt. Got it back put it in and it still reads full. Disconnect
> the sending unit gauge goes to empty, no in between. Tested original
> sending unit and it gives the same resistance as the rebuilt one 20oms to 
> 213 ohms. Checked the volts at the tank end of the wire 12.2v. Still reads 
> full or empty when disconnected.
>
> Fred;
>
> You did well in checking the resistance of the sending unit.  You know 
> that it is OK.  In all of these cars, the instruments run from a 5 volt 
> regulator.  In many of these it is built into the fuel gauge.  In some 
> models it is a separate item attached to the back of one of the gauges or 
> in some other cases plugged into a circuit board which the gauges are 
> mounted to.  When the regulator fails and passes the full 12 volts on to 
> the gauges they will read high since they have more than twice the normal 
> voltage applied to them.  (The ammeter gauge is an exception to the above 
> statement, is is in parallel with current going to/from the battery and 
> generator).  All Chrysler products used this 5 volt regulator even on the 
> models that operated with a 6 volt electrical system (1955 and previous). 
> You may not be able to see the regulator from the outside of the gauge. 
> Not all of the service manuals discuss this fact.  I looked at the '56 
> service manual on the club website and it does not mention this regulator. 
> It may have been covered in detail some years before in either a service 
> manual or in some training material.
>
> Does anyone else in the group have detailed information on which gauge has 
> the regulator?
>
> Joe S.
>
>
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