JasonI got nothing on the first jump. Wired a new end on the ground still nothing. Looks like a new sending unit is next. Thanks for your help.Tod
My name is XXXXX XXXXX X will be helping you today. Most questions will involve troubleshooting, and usually take many posts back and forth.
Are you jumping between the center post of the fuel sending unit to a confirmed good ground? And the gauge is still not moving (with the key in the run position)?
Correct, I tried it to the ground on the sending unit and the ground terminal on the battery as well. Both with the key in run position and no movement on the gauge.
The pink wire is on the terminal of the sending unit correct?
What happens if you take the pink wire of the terminal of the sending unit and stick that right to ground?
I still get no movement on the gauge.
Then you have another problem. You know that gauge works because you jumped ground to the S terminal at the gauge and it worked.
Now you either do not have the correct pink wire on the fuel gauge. That it is not the same wire that runs to the tank. Or that wire has a break in it someplace.
If you grabbed some regular old 16 gauge wire, and hooked it up to the S terminal on the gauge, and then ran it across the boat and grounded it at either the fuel tank sender or battery, then the gauge would go to full. It's the same thing as doing it at the gauge, but just with a longer wire.
You definitely want to start by checking the wires behind the gauge and seeing if there is anything else back there that looks pink. But if your confident that you have the right wire, then the wire has a break in it in the harness.
It takes way to long to find breaks in the wire harness, more trouble than it is worth. So if this is the case really your best bet if nothing stands out at is is to run a new wire from the fuel gauge down to the fuel tank sending unit.
Glad I caught that!
Post back with questions
I am sure I have the right wire on the gauge. I will try running a new wire to the sending unit. I will need to disconnect the old ones and hook up the new, correct?
Disconnect the wire on the S terminal of the fuel gauge. Then just run a new wire outside the boat. Just string it from the gauge to the sending unit for testing purposes.
Then take that temp wire an hook it up to the S terminal on the fuel gauge in place of the wire that is on there now. And tap that wire to ground at the fuel sender.
We know the gauge works, thats tested.
We don't know if the sender works yet, that is untested.
But we also know there is some kind of problem going on with the wire between the gauge and the sending unit, so thats the one to work one next.
Once you know it works with the new when then you can go about installing it/running it, and tucking it into place.
Let me know if it still gives you troubles.
Ok, it looks like the pink wire is bad. I get the test signal when I touch it to the ground and the full indicator when I go direct to the sending unit.
Thanks for your help.
Good. Glad to hear it is making sense to you now.
Fix/replace that wire, and then simply retest the sending unit by grounding the wire at the sender again.
Feel free to post back if it still gives you troubles. There are no time limits to the questions so take your time.
Ok, thanks. I will let you know.
Your very welcome. If I dont hear from you tonight have a great night. And i'll be back online sometime tomorrow morning. (I'm in FL, eastern time)
Degree in Marine Technology. Gas and diesel marine mechanic.