Dim lights in dash

Rally dash has the limiter built INSIDE the fuel gauge.

On your indicator, does the same front signal lamp flash properly? Same wire, just branches off

Headlights, --the dimmer feeds out the headlight "hi" power on the same wire that feeds the dash indicator. This means the dimmer should be OK. The power goes through the BULKHEAD CONNECTOR which is a huge suspect. Otherwise, "up front," headlights, sockets, grounding. Since none?? of the hi beams work? I would suspect the bulkhead connector