Slant Six Forum
https://slantsix.org/forum/

Fuel sender unit - 1962 Valiant
https://slantsix.org/forum/viewtopic.php?t=49958		 Page 1 of 1
Author:  crickhollow [ Mon Oct 01, 2012 10:08 pm ]
Post subject:  Fuel sender unit - 1962 Valiant
I have removed the fuel sender unit from the fuel tank of my 1962 Valiant.

What is the correct way to test the functioning of the fuel sender unit?

Thanks, Peter
Author:  mcnoople [ Tue Oct 02, 2012 5:11 am ]
Post subject: 
Using a multimeter attach 1 probe to terminal attach other probe to body of sender. Move the float arm and watch the resistance (ohm) values. There should be a gradual change in resistance at the arm moves. If the values don't change or jump around the sender is probably bad. A small side note is that some multimeter can be a little slow to read so make sure you are moving the arm slowly. I can't remember the high and low reisitance values off the top of my head but I am sure they have been posted here before.
Author:  wjajr [ Tue Oct 02, 2012 5:12 am ]
Post subject: 
Switch VOM to ohms (resistance low scale 200), place meter’s black lead to fuel tube where car’s fuel line would be connected, and other lead to electrical connection that fuel gage connects to. Move float lever from full to empty and record highest and lowest ohm reading (somewhere between 10 or so and 78 ohms is about normal). While moving float look for any changes in reading outside of the 10 to 78 reading which would indicate an electrical interruption between resistance coil and pickup as it moves along the winding which would most likely be caused by corrosion.

To check fuel gage, turn ignition to run, briefly ground the wire that connects to fuel sender unit; if working, gage will move to full. To check fuel gage out of car, apply 5 DC volts to gage; three 1.5 v batteries in series (4.5v) would be close enough to see if gage responds.
Author:  mcnoople [ Tue Oct 02, 2012 5:16 am ]
Post subject: 
Quote:
(somewhere between 10 or so and 78 ohms is about normal).

To check fuel gage, turn ignition to run, briefly ground the wire that connects to fuel sender unit; if working, gage will move to full. To check fuel gage out of car, apply 5 DC volts to gage; three 1.5 v batteries in series (4.5v) would be close enough to see if gage responds.
I knew those resistance values were posted on here somewhere :D
Author:  crickhollow [ Wed Oct 03, 2012 3:29 am ]
Post subject: 
Thanks guys, your advice was excellent.

Peter
Page 1 of 1 All times are UTC-08:00
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/