Competition Ltd Harness Wiring

[Keith Lawyer]

I'm installing a Comp Ltd harness in my '90 200 for single H4 non-turbo
euro lights.

It's all easy enough except for the trigger which is setup to plug into
the older headlight harnesses (at least here in the US) with dual sealed
beams.  So, I went out to an '80 5k parts car and snipped the headlight
connector off, then clipped the 9004 connector off my '90 and wired up
the older connector, brown to brown, yellow to yellow and white to white
basically just hoping Audi kept the wiring the same from '80 to '90.

I now had the appropriate connector on my factory harness, plugged it
into the Comp Ltd harness, and I have lights on low beam (unk if they
are high or low) and no change when I flip to high beam.

What am I missing?  I don't really have anything to reference on the
Comp Ltd harness as far as knowing what should be ground, low beam
trigger and high beam trigger, and since the relays aren't standard
Bosch I can't even look at the underside of them for 85, 86, 87a etc.

Basically the 9004 plug's got white, yellow and brown and I need to
mate this to blue, orange and white on the Comp Ltd harness.  Anyone?

I searched the archives but only found issues on headlamp check lights,
burned bulb sockets and the like.  I didn't find anything specific
beyond a very general FAQ on Comp Ltd's site.

Keith L