Ok new to the site and to forums in general. I am posting this here and posted in Lighting and Electrical too b/c I was not sure where the most appropriate place was...So here goes...
I have an 89 Jimmy 4x4 that has a faulty fuel gauge. It always reads empty regardless of how much gas is in the tank. I have been trying to resolve this issue for some time now and have at this point replaced the sending unit, fuel pump, and gas tank. I have also checked and cleaned every ground wire on the sending unit as well as the grounds from the battery to the engine and frame. After all this, the gauge still only reads empty. Here is the odd part, when I had the tank out and the sending unit connected outside of the tank, when I manually move the float arm assembly up and down the gauge works perfectly. I have done this twice now and everytime I put the sending unit back in the tank, the gauge does not work. Any suggestions of help with this will be much appreciated!!!