Patriot

I'm new to the forum; I've searched past threads and while I didn't find anything to exactly match my problem I found some basic things to try. I'll pose my dilemma nonetheless.

The car is a 1990 Stanza. The other day I noticed my left high beam was burned out, at that time DRL worked fine in both and low beams worked fine in both. By the time I got home that night the left light was completely burned out; no DRL, low or high beam. I also noticed the high beam indicator was illuminated when the lever was in the low beam position. The next day I replaced the bulb and no result. I swapped left and right bulbs and the right light functioned fine. So I know the light bulbs were fine. I checked the fuses and they both checked ok.
This morning my wife took the car; she phoned me to say both headlights are now out. I checked it out tonight and she 's right. No DRL, low or high beams.
I checked the high low lever on the steering column for voltage, I think I checked it properly, and it seems ok at different positions, my marker lights and turn signals all function properly. I did not check for voltage any where else (dumba**). I will tomorrow. Also the high beam indicator is illuminated when the headlights are turned on, low or high beam position.
I'm going to change both headlamp plugs and install new bulbs. I'm also going to grab a signal lever assembly from the wrecker (though I don't think that's the problem, but I really don't know how to test it).

Aside from that what else could I check? I appreciate any help I can get.

Thanks in advance,

Patriot