1964 Fuel sender W low fuel. | Ford Thunderbird forum club group 1955-2005 models

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1964 Fuel sender W low fuel.

  • Thread starter Thread starter My390ci
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My390ci

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Thunderbird Year
1964
I have a 64 that has a leaking float. I've pulled the sending unit out and it is in very good condition. Before I order a new float is there a way to test the Thermistor for the low fuel detection to make sure it's operating correctly? I'd hate to get it all back in, put gas in and find out the low fuel warning is not working and have to drain fuel and go through the removal process again.

Thanks in advance,

Steve...

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Get a piece of #14 that will.reach from sender at tank. Disconnect wire at sender Connect this wire to wire removed from sender.
Get someone to watch instruments.
Turn on Ign Sw to acc.
CONNECT free end of test wire momentary.
If you get light. The wiring is good. If not.This is where the TS gets more in deph. Get in touch with me and I'll try to get you through the Trouble Shooting.
 
Thanks for the response. Which post on the sender do I connect the #14 wire to? Does it have to be #14?

Thanks in advance,
 
My390ci said:
I have a 64 that has a leaking float. I've pulled the sending unit out and it is in very good condition. Before I order a new float is there a way to test the Thermistor for the low fuel detection to make sure it's operating correctly? I'd hate to get it all back in, put gas in and find out the low fuel warning is not working and have to drain fuel and go through the removal process again.

Thanks in advance,

Steve...
Click to expand...
To check an original brass-cased thermistor, measure the resistance from the yellow wire to the case (ground).
It should be in the 500-700 ohm range. Note: The resistance will change slightly as you measure
because the voltage from the ohmmeter will heat up the thermistor slightly.

The thermistors used in the aftermarket fuel senders measure about 1000 ohms.
 
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