Your rear lights are working because the rear ground (trunk, driver's side back corner, hidden by the carpet) is good.
Your front lights may be malfunctioning because those grounds (one for left, one for right) are bad; book calls them G102 (Behind LH Lights) and G103 (Behind RH Lights). May need to do hand-over-hand tracing of all the wires. LEDs are also polarity-sensitive so if grounds are good, may be worth experimenting with "reversing" a bulb in a socket.