[DeTomaso] Fuel level sender removal

Mike Drew MikeLDrew at aol.com
Tue Feb 12 21:08:05 EST 2019 

Thanks Larry!

Mike

Sent from my iPhone

> On Feb 12, 2019, at 13:00, Larry Stock <larrys at panteraparts.com> wrote:
> 
> You can remove and install the fuel tank sender without removing the
> window.
> Larry
> 
> On 2/12/19, 12:53 PM, "DeTomaso on behalf of Mike Drew via DeTomaso"
> <detomaso-bounces at server.detomasolist.com on behalf of
> detomaso at server.detomasolist.com> wrote:
> 
>> Thanks Doug,
>> 
>> Sender is still in the box. I am just trying to confirm its possible to
>> remove the sender from the tank without removing the window before
>> starting the surgery. I will probably do it Monday.
>> 
>> Mike
>> 
>> Sent from my iPhone
>> 
>>> On Feb 12, 2019, at 12:49, Doug <doug351c at gmail.com> wrote:
>>> 
>>> Mike,
>>> 
>>> You'll cause no harm if you connect the Yellow and the White/Black
>>> wires to the sender wrong.
>>> Both of the sender's terminals work by pulling the voltage towards
>>> ground, one does so with a switch and the other with a variable resistor.
>>> 
>>> I'm assuming you've already installed the sender in the tank and hence
>>> you can't move the sender's float arm.
>>> If you have an Ohm-meter, it's likely that even with the gas tank
>>> empty, the gauge terminal will measure as a higher Ohm reading than the
>>> tank-empty lamp terminal.  Both of these measurement should be made
>>> between the respective terminal and the sender's ground terminal.
>>> 
>>> Doug Braun
>>> Blue 73L #5505
>>> 
>>> -----Original Message-----
>>> From: DeTomaso [mailto:detomaso-bounces at server.detomasolist.com] On
>>> Behalf Of Mike Drew via DeTomaso
>>> Sent: Monday, February 11, 2019 7:39 PM
>>> To: Julian Kift <julian_kift at hotmail.com>
>>> Cc: De Tomaso List <detomaso at server.detomasolist.com>
>>> Subject: Re: [DeTomaso] Fuel level sender removal
>>> 
>>> Julian,
>>> 
>>> Right, got that.  That¹s not the issue.
>>> 
>>> The issue is, which contact ON THE SENDER is for the needle and which
>>> for the light?  Both are connected to wires that disappear inside the
>>> sender. I would like to be able to simply tell visually which is which
>>> without having to install and hook them up.
>>> 
>>> Worst case, I have a 50/50 chance of success.  Actually probably more
>>> like 75/25 because one would hope the new sender follows the same scheme
>>> as the old one. 
>>> 
>>> This whole thing is being driven not by a bad sender (my existing one
>>> is perfect), but instead by a bad gas tank.
>>> 
>>> Somebody gave me a free perfect-looking tank 25 years ago. When my old
>>> tank started leaking (from the top it turns out) I reconditioned the
>>> free replacement inside and out, after carefully inspecting it of
>>> course, and then installed it (a non-trivial undertaking since it
>>> required engine removal).
>>> 
>>> Come to find out that free gas tanks are free for a reason!  The fuel
>>> pickup pipe inside the tank apparently has a pinhole about 2/3 of the
>>> way up. It works perfectly when the tank is full. At about 2/3 full fuel
>>> pressure drops to less than 1 psi and when the level is less than that,
>>> it doesn¹t feed fuel at all.
>>> 
>>> The later cars had the fuel pickup built into the sender. So by
>>> installing a later sender into my early tank, I can move the fuel hose
>>> over to the sender and fix my problem without having to pull and change
>>> the tank again.
>>> 
>>> And, I will have a perfect Pre-L sender available for sale afterwards
>>> too. 
>>> 
>>> Mike
>>> 
>>> Sent from my iPad
>>> 
>>>> On Feb 11, 2019, at 19:29, Julian Kift <julian_kift at hotmail.com> wrote:
>>>> 
>>>> Of course you could just go to Pantera Place and look at those wiring
>>>> diagrams Bill spent so much time developing!
>>>> 
>>>> Yellow low fuel warning light and white/black fuel gauge.
>>>> 
>>>> Julian
>>>> 
>>>>> On Feb 11, 2019, at 19:22, Julian Kift <julian_kift at hotmail.com>
>>>>> wrote:
>>>>> 
>>>>> Mike,
>>>>> 
>>>>> Once you get the unit out it should be pretty evident which wire
>>>>> feeds what and wether that is oriented the same on the new sender. In
>>>>> theory it shouldn¹t matter as the wires are just connected to either
>>>>> side of a variable resistor one side to the wound resistor coil the
>>>>> other the resistor wipe arm (float).
>>>>> 
>>>>> Julian
>>>>> 
>>>>>> On Feb 11, 2019, at 18:40, Mike Drew via DeTomaso
>>>>>> <detomaso at server.detomasolist.com> wrote:
>>>>>> 
>>>>>> Hmm,
>>>>>> 
>>>>>> Server seems to have stripped my photo away....
>>>>>> 
>>>>>> 
>>>>>> <image1.jpeg>
>>>>>> 
>>>>>> 
>>>>>> Mike
>>>>>> 
>>>>>> 
>>>>>> Sent from my iPad
>>>>>> 
>>>>>>> On Feb 11, 2019, at 18:34, Mike Drew via DeTomaso
>>>>>>> <detomaso at server.detomasolist.com> wrote:
>>>>>>> 
>>>>>>>   Thanks Curt.
>>>>>>> 
>>>>>>> Turns out I had a photo of my sender, and my recollection was
>>>>>>> completely wrong. Mine is two-wire with a ground tab.
>>>>>>> 
>>>>>>> image1.jpeg
>>>>>>> 
>>>>>>> I have to just hope that the new sender respects the old sender
>>>>>>> wiring
>>>>>>> orientation.
>>>>>>> 
>>>>>>> Still waiting to hear from somebody who has successfully pulled the
>>>>>>> sender without removing the window?  It may not be possible.
>>>>>>> 
>>>>>>> Mike
>>>>>>> Sent from my iPad
>>>>>>> On Feb 11, 2019, at 17:29, Curt Hall <[1]cuvee at sbcglobal.net>
>>>>>>> wrote:
>>>>>>> 
>>>>>>> Mike...
>>>>>>> Here is a photo of my 73. I had problems last year with gauge
>>>>>>> reading
>>>>>>> on E? Pull the sender and found the Float was full of fuel,
>>>>>>> replaced
>>>>>>> the float and all is good. 50/50 chance of wires bring wrong, I
>>>>>>> have my
>>>>>>> windows out so I was able to hook up and test things before
>>>>>>> installing.
>>>>>>> Good Luck Curt
>>>>>>> <20190211_172047.jpg>
>>>>>>> [2]Sent from Yahoo Mail on Android
>>>>>>> 
>>>>>>> On Mon, Feb 11, 2019 at 3:00 PM, Mike Drew via DeTomaso
>>>>>>> <[3]detomaso at server.detomasolist.com> wrote:
>>>>>>> 
>>>>>>> All,
>>>>>>> It seems to me it's possible to remove the fuel level sender
>>>>>>> without
>>>>>>> removing the side window glass. In fact I'm fairly certain I've
>>>>>>> done
>>>>>>> it, years ago, but can't remember for certain. Can anybody confirm
>>>>>>> please?
>>>>>>> Also does anybody know which wire goes where on a two-wire sending
>>>>>>> unit? My old one has three wires but new one has no provision for
>>>>>>> ground, so I will have to fabricate one. I have a 50/50 chance of
>>>>>>> getting the other wires correct but would like to improve my odds.
>>>>>>> I
>>>>>>> have no reason to believe the new sender will respect the wiring
>>>>>>> orientation of the old one?
>>>>>>> Mike
>>>>>>> Sent from my iPad
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>>>>>>> <20190211_172047.jpg>
>>>>>>> 
>>>>>>> References
>>>>>>> 
>>>>>>> 1. mailto:cuvee at sbcglobal.net
>>>>>>> 2. 
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>>> 
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>>> <Fuel gauge and Sender.pdf>
>> 
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