I got far enough along that I was able to find connectors and parts for everything needed to make a HID to HID harness (armed with pbalias wiring chart), except the leveling motor connector. I bought a pair of leveling motors just for the connector.
Unfortunately harvesting the connector isn't very clean, and wouldn't yield a very nice looking conversion harness.
I also have concerns about water/how I would protect the connection.
This and the fact lamps were really expensive caused me to put my project on hold. I'm prepared to move ahead if I can find a suitable connector; seems there is a decent supply of lamps on eBay now and prices are reasonable. Anybody have a source I could try for the connector? This is what it looks like:
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