62 Valiant dash lights

If the wire's got continuity from the fuel gauge sender at the tank all the way up to the dashboard, then here's a list of parts you might need to fix it:

Sender float: Ford P/N COAZ-9202-B (N/A from Chrysler any more; this one fits and works perfectly)

Sender Strainer "sock": GM P/N 5651 705 (factory strainer at the end of the sender's fuel pickup pipe is probably clogged, degraded or missing -- here again, N/A from Chrysler and this one fits/works)

Gasket: Chrysler P/N 6031 475 (replace every time you remove the sender)

Sender grounding clip: Chrysler P/N 2258 862 (necessary or you won't get a gauge reading)

If none of that fixes it, you're down to needing a new sender and/or a new gauge.

Dashboard lights: make sure it's not just all the bulbs being burned out; if that's not it, follow the advice already given in this thread. Corrosion/dirt/failure in the dashboard light rheostat built into the headlamp switch is a common cause of no dash lights.