J240ZTurbo Posted July 2, 2010 Share Posted July 2, 2010 Got a 280z gas tank for my 240z Turbo swap, I see four cables from the 240z harness and only one plug from the 280z tank, does anyone know how these go connected to the 280z tank? Quote Link to comment Share on other sites More sharing options...
Tony D Posted July 5, 2010 Share Posted July 5, 2010 Simple: 1)Take the locking ring off both tanks. 2)Remove the sending units. 3)Install the 240Z sender into the 280Z tank. 4)Wires are now correct for the chassis, no cutting required. (You do not have a 'low fuel' capacitance sensor to light the light that is not in your 240Z dash anyway.) Comprende Amigo? Quote Link to comment Share on other sites More sharing options...
J240ZTurbo Posted October 27, 2010 Author Share Posted October 27, 2010 tony question I put a test light on one of the cables do you know why Im not getting a + or power signal? Quote Link to comment Share on other sites More sharing options...
Tony D Posted October 28, 2010 Share Posted October 28, 2010 Maybe it's the black wire that should be ground? The 240 does have ground and power on the connector and the wires all tend to have the same color back there after the years take their toll. The circuit, btw is on the ground side, the 'power' wire is actually the ground side of the gauge movement. The sender regulates the ground for the gauge and that is how you register fuel level. One wire is directly grounded to the chassis though. That keeps the sender which technically floats on that rubber o-ring, connected securely to ground of the chassis. The wire harness is grounded back there as well so there should be a decent ground path. Cleaning that ground point back there on the chassis should brighten up your tail lights as well! Quote Link to comment Share on other sites More sharing options...
J240ZTurbo Posted October 28, 2010 Author Share Posted October 28, 2010 (edited) tony, there are 2 wire one yellow and one black, which one is + i belive the yellow correct? i got a test light and I got no power from neither one of them, where does the fuel sending unit get power from? is there a fuse somewhre in the car? Edited October 28, 2010 by juan240z Quote Link to comment Share on other sites More sharing options...
Tony D Posted October 28, 2010 Share Posted October 28, 2010 You need to download the FSM and look at the wiring diagram. What happens to the gauge when you ground the yellow wire against the chassis---it should move one way all the way. When you remove it from ground it should go back the other way (whichever that was)... If it doesn't there's either a break in the line or no power to the front of the circuit (or a bad gauge)... You need to follow the circuit on the FSM wiring diagram, this one is not one I can do from memory! Quote Link to comment Share on other sites More sharing options...
J240ZTurbo Posted October 28, 2010 Author Share Posted October 28, 2010 so question, the + wire going to the sending unit does it suppost to have power or not? Quote Link to comment Share on other sites More sharing options...
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