Hi beams, low beams, taillights, and dash lights stopped working.

check the headlight relays ,
Check for possible faulty light stalk switch also. Dash lights may fail with this possible cause.
Check fuses

check your fuse box

there are fuses for each light, high and lo beam. the grounds are grounded at all times, I dont know what you mean by open seeking. its wired like every other car. Right low beam is fuse 21 Red/White wire should be hot if fuse is good. I dont know what you mean by hooking low beam connector to battery? check fuses.

check your fuses, hi and low beams have seperate fuses for each one low and high beam. #15, #17 both 15 amps and two relays in there also.

in the fuse and relay box. is in underhood fuse box. have a good day !

You need a new headlight dimmer switch located on the steering column between the dash and the firewall

possibly head lamp switch. daytime running lights on separate circuit and use the high beams at reduced voltage. does flash to pass work? that's high beams too. do high beams work?

Is it just low beams?
do taillights work?

Im just curious if you found a fix for this issue because I'm curently having the same problem with 98 civic?

Replace the high beam switch, it is part of the multifunction switch.

It is entirely possible for both low beams to be out have you verified that there is No voltage on the low beam electrical circuit of the headlights?

Some time back I found some data on a similar website suggesting that the Day Light Running circuit board, just under the steering column, developed cracks in some of the soldered joints. Your high beams should also be affected with loss of day light running lights.
Resoldering repaired the continuity of the circuits. Ours is now working quite reliably. Some of the defective areas developed slight brownish discoloration, that's how I was told to recognise the areas to be resoldered. Hope this will help you solve your problem.