Yet Another Headlight Issue

[masterace]

Ok, here we go. Driving my '86 Vanwagon to a gig a few weeks ago and my aftermarket radio turned off and on again. I leave my gig and my headlights turn off (sidenote: it was raining and I had noticed a little water getting in the front of my vehicle). I hear a brief sizzle and then nothing. I switch my highbeams on and I have both lights on my left hand side, and nothing on my right (except my parking lights). Low beam switch gives me nothing on either side, I have no cornering lights, and no high beam indicator light when lever is pulled back.

Pulled the blue plug under steering column and it looks really clean (no burnt out pins on either side or anything else funny). Used a test light to test all sockets for LH and RH fuses and all are getting power. Pulled the fuse box out and all plugs in the back look good Replaced fuses. I tested my relay and fusible link behind pass seat. My left hand low beam socket is only getting power w the high beam activated. My right hand light sockets get no power regardless of switch, though there is continuity from the fuse box to one of the two wires wire (the solid red w blue hashes i think).

Does this sound like a grounding issue? If so, where would said ground be found?

Any thoughts appreciated. Thanks!!