After 4 years of ownership and 270 hrs the fuel gauge on my B3030 HSDC is now stuck on full. I removed the dash to check for tightness of all wires, everything appears fine. I removed the sending unit and tested the float in a bucket of diesel fuel and it moves freely up and down. The weird part is when I removed the sending unit from the fuel tank and connected the two wires to it, one a ground and the other power it worked fine. I move the float up and the gauge goes to full, lower it and I can watch the gauge drop. Lower the float all the way the gauge goes to empty. I then reinstalled the sending unit in the fuel tank connecting the same wires in the same order but when I turn the key to on it goes right to full. Turn the key off it goes to empty.
I also removed the battery ground to check for corrosion but it was very clean.
I removed the power wire feeding the sending unit and touched it to the ground of the sending unit, gauge went to full.
I removed the ground wire from the sending unit, then attached a long piece of wire to the ground on the sending unit and then touched a æ¾±olt on the frame, still reads full.
I removed the sending unit and took the cover off. Everything looks like new, no broken parts.
Others have suggested an ohmmeter but even if I had one I would not know how to use it. I guess if it is imperative I have an ohmmeter to definitely figure out what is wrong I could get a cheap meter from Harbor Freight and learn/try to learn how to use it.
FYI I have approximately 1/2 tank or less of fuel.
Any suggestions? I thank you in advance. Stanley
I also removed the battery ground to check for corrosion but it was very clean.
I removed the power wire feeding the sending unit and touched it to the ground of the sending unit, gauge went to full.
I removed the ground wire from the sending unit, then attached a long piece of wire to the ground on the sending unit and then touched a æ¾±olt on the frame, still reads full.
I removed the sending unit and took the cover off. Everything looks like new, no broken parts.
Others have suggested an ohmmeter but even if I had one I would not know how to use it. I guess if it is imperative I have an ohmmeter to definitely figure out what is wrong I could get a cheap meter from Harbor Freight and learn/try to learn how to use it.
FYI I have approximately 1/2 tank or less of fuel.
Any suggestions? I thank you in advance. Stanley