HELP: gas gauge or sending unit? which is at fault? SEE IMAGES so, I hooked up my gas gauge that was not working by running power from the back of the volt gauge power stud and jumped it over to the gas gauge power stud on the backof the gas gauge to get the gauge power. then, I grounded the ground stud on the back of the gas gauge to the frame. now, gas gauge has ground and power where it was disconnected before. So then, I now have power to the sending unit at the gas tank under the passenger seat and there is a good ground there as well. BUT, the issue is that when I have the power attached at the sending unit and it is grounded, I can hear the sending unit crackling in the gas tank! are you suppose to be able to hear that sending unit? seems very odd. it is very noticable crackling from the unit. I got nervous and disconnected the power at the sending unit to be safe. SO, now the gas guage registers beyond Full - no mater what! before it was not even hooked up, so it naturally registered Empty. But now, sending unit attached or not attached, the gauge reads Full. AND the sending unit crackles. so, can you tell which is bad from this? if the sending unit is bad (since it crackles with electricity) would replacing it make that gas gauge stop registering Full and give a correct reading? is the sending unit the reason why it is registering Full no matter what? or is the gauge broke or would it always read Full until it got a correct signal from the sending unit?