Oil & Fuel 2003 Foton 404 fuel gauge problem

   / 2003 Foton 404 fuel gauge problem #1  

clanci

New member
Joined
May 16, 2014
Messages
3
Location
newark il
Tractor
foton 404 / ford 851
Hi all,
I have a problem with the fuel gauge on my 2003 404. It is reading empty no matter how much fuel is in it. I have a pigtail coming off the sender if I put a volt meter on the tractor side all I get is .138 mv I'm not sure but I think I should get more than that does anyone know what voltage is supposed to be supplied to the sending unit or how I might trouble shoot this problem.
Thanks
 
   / 2003 Foton 404 fuel gauge problem #2  
The gauge sending unit is a variable resistor to ground if it is a single wire unit. Remove the sending unit from the tank and connect to an ohmmeter. Move the float back and forth and measure the resistance. If you don't get a reading the sending unit is bad.
Be sure that all connections in the harness are clean and tight.
 
   / 2003 Foton 404 fuel gauge problem #3  
X2. The voltage you're looking for is at the gauge, not at the tank. The sending unit in the tank is between the gauge and ground.

//greg//
 
   / 2003 Foton 404 fuel gauge problem
  • Thread Starter
#4  
Thanks for the input. The sending unit has 2 wires coming off of it when I put a ohm meter across those wires I get 45 ohms I have not taken the sending unit out of the tank yet so I cannot say that is the problem at this point I hope so otherwise I think I have to replace the whole instrument panel. Has anyone had a panel go bad? I hope that it is the sending unit since that will be the least expensive to fix.
Thanks again
 
   / 2003 Foton 404 fuel gauge problem #5  

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