Re: ****COULD BE SPAM**** [Chrysler300] DC Circuits 101

["Terry & Andree Hoeman" <tehoema@xxxxxxxxxxxxxx>]

There is no ground strap on the 55.  I put ground wire between the unit and 
car body when replacing one anymore.  Exp if the tank has been recoated 
since no ground path is there anymore.

Back to the 61 question the unit removes from the front of the tank.  No 
dropping required at all.  Thinking that is a two wire unit with no tank 
grounding needed there though.  Didn't the strap type come in later 60's?? 
Not real sure there.
----- Original Message ----- 
From: "Rich Barber" <barber@xxxxxxxxx>
To: "mocarjoe" <mocarjoe@xxxxxxx>
Cc: "Chrysler 300 Club International Yahoo Server" 
<Chrysler300@xxxxxxxxxxxxxxx>
Sent: Saturday, September 03, 2005 10:34 PM
Subject: ****COULD BE SPAM**** [Chrysler300] DC Circuits 101


> Joe:
>
> Thanks for the tip.  It very well could be a poor ground--and that could
> lead to an unsafe condition if it allowed static electrical charge to
> build up.  I'll test it with a jumper wire from the sender base to a
> good ground before I get out and get under.
>
> C-300'ly,
> Rich Barber
> Brentwood, CA
> 1955 C-300
>
>
>
> mocarjoe wrote:
>
>>You may have a bad ground strap causing the faulty reading.  Where the
>>metal fuel line exits the tank there is a metal strap/clamp that jumps
>>over the rubber line connection.  Now if you put your resistor exactly
>>where the resistor was, this would not be the case.  However if you used
>>a ground jumper to do the testing I would check this.  Normally all you
>>need to do is twist the strap back and forth around both ends. to clean
>>the corrosion enough to get a good reading.
>>
>>Rich Barber wrote:
>>
>>
>>
>>>Paul:
>>>
>>>The float on my 1955 C-300 was cork and still floating fine, although 50
>>>years of gas had dissolved the black tar coating on it.  There is a
>>>slide wire resistor on mine that no longer functioned, so I took it out
>>>and had it rebuilt.  I was not and am not happy with the rebuild as the
>>>resistor installed was different than the original.  The gas gauge
>>>needle always flickers now and I can't believe that is normal.   I did
>>>have the cork float replaced with a hollow brass one and that worked
>>>ok.  My float was accessible through a big (factory) hole in the trunk
>>>floor, so replacement was easy.  I stuffed a rag into the hole while the
>>>float was in the shop.
>>>
>>>I suggest you obtain a replacement sending unit and have it on hand when
>>>you drop your tank.  The failed unit should have core value.  I built a
>>>variable resistor system with fixed and variable resistors from Radio
>>>Shack to calibrate my gauge and found that full was 10 Ohms, Empty was
>>>72 Ohms.  I find that I will have to adjust the float wire angle to
>>>better reflect the fuel level in the tank.  You should probably do this
>>>before you reinstalling the removed tank.  Calibrate the fuel gauge
>>>first, then adjust the float wire to provide the desired resistance with
>>>various gasoline levels.  Please be careful.  Don't do this in a garage
>>>with a furnace, water heater or any sparking motor or switch.
>>>
>>>Some or all of this information may be totally irrelevant to your newer
>>>car with the 12-volt system.
>>>
>>>See attached for new gas gauge configuration (not for server).
>>>
>>>C-300'ly,
>>>Rich Barber
>>>Brentwood, CA (Got gas for $2.99 today)
>>>1955 C-300
>>>
>>>
>>>Paul Weihl wrote:
>>>
>>>My gas gauge always reads empty, even when the tank is full.  I have 
>>>checked the resistance of the tank float and it reads about 47 ohms, 
>>>indicating that the tank is empty.  I then substituted a 20 ohm resistor 
>>>in place of the float and the gauge reads about half. So the problem is 
>>>in the float or the resistor in the float.  My question is, what is the 
>>>float made of, a fiber type material that would/could get saturated, or a 
>>>sealed metal "can"?  I really don't fancy the idea of having to drop the 
>>>tank if there may be another way to fix the float.  Probably wishful 
>>>thinking on my part.  Thanks for any help.
>>>
>>>Paul Weihl
>>>300G
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
>
>
>
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