Mustanggt9589

My 66 mustangs fuel gauge has not been working. I thought it was the gauge so I bought a new one. Put the new gauge in still nothing. I tried to switch the black wires on the voltage regulator and the fuel gauge stated to work but now my directionals that were working fine before I switched the wires the directional lights on the cluster stay lit when the directionals are not being used. Does anyone have any suggestions or a picture of their voltage regulator on the back of the gauges wired up so I can see if it's wired correctly? Any help would be appreciated