iammarcuse
Petty Officer 2nd Class
- Joined
- Oct 15, 2007
- Messages
- 140
I have a Key West DC2020 with a 140 Suzuki. It sat for a couple of months and the fuel gauge reads E yet I know it is 1/3 full. It seemed I was getting voltage back from the sender so I tried a brand new gauge. Still nothing. Swapping out the sending unit is a challenge as it is not right under the access hole and will require pulling out pedestal seats and the floor panel. So I want to make sure that is the problem first.
At the sending unit it reads 110 ohm across from sending wire to a known ground. That would seem right on 1/3 tank of fuel with a 230 -33 ohm sender. At the gauge I read 4.8V across the sending to ground. Which again seems about right given V12 at 110 resistance. But clearly I am missing something here.
Back at the gauge I read 4.8V from sending wire to a known ground. I also read 4.8V from the ground wire to a known ground. Does that sounds right? I am not 100% clear on how these circuits in a fuel gauge are supposed to work, so I don't know what to make of that.
I am wide open to solutions here. I must be missing something. Thank you.
At the sending unit it reads 110 ohm across from sending wire to a known ground. That would seem right on 1/3 tank of fuel with a 230 -33 ohm sender. At the gauge I read 4.8V across the sending to ground. Which again seems about right given V12 at 110 resistance. But clearly I am missing something here.
Back at the gauge I read 4.8V from sending wire to a known ground. I also read 4.8V from the ground wire to a known ground. Does that sounds right? I am not 100% clear on how these circuits in a fuel gauge are supposed to work, so I don't know what to make of that.
I am wide open to solutions here. I must be missing something. Thank you.