hi and lo beams both work, although cant tell much of a difference. both are way too dim to safely drive at night, like they barely illuminate the road at all. battery new May 2022. Starter spins quickly and interior, tail lights seem to be sufficiently bright. Sounds like i need to start with halogen bulbs, upgrade grounds and continue on with checking connections at headlight, dimmer switch etc. entire truck got new wiring harness done by previous owner so there may be more going on here.
