what's going on with my lights?

Well this is why you need (don't take this as lecturing) to get into specific circuits so to say

This is either power to the tail fuse, the fuse clips, the fuse, or the wiring to the light switch (or could have been the switch)

The HEADLIGHT switch has TWO power sources. B1 is for ONLY the headlights and comes off the ammeter circuit. So the headlights can work but no other lights

B2 is the second power terminal on the light switch and this comes from your tail fuse
This powers tail/ park and of cours marker, and / dash dimmer controlled lights

The dash dimmer gets power from the light switch tail circuit, that dimmer controlled power LEAVES the light switch on the tan wire and goes TO the INST fuse in the panel, then out to all dimmer controlled lighting. So the INST fuse is a "bit of a trick" and is the ONLY fuse that is wired that weirdly "All that" orange wiring in the fuse panel is the dimmer controlled dash light wires LEAVING the fuse box for their respective lamps

So basically you need to make CERTAIN the tail fuse is hot on both fuse clips and if so check the (short length) of wire from there to the light switch, and especially the terminal connections at each end

The tail/ park lights need to be your focus as again, the dash lamps are powered from that circuit.