If shorting the sending unit wire to ground with the key on does not make the gauge read empty, try shorting the gauge terminal at the other end of that wire to ground. If the gauge then reads empty the wire from the gauge to the sending unit is open and needs replacing. JUST MAKE SURE YOU DO NOT SHORT THE POWER TERMINAL ON THE GAUGE TO GROUND. SMOKE MAY OCCUR.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| 
