Discussion
Continuing reverse engineering of the ECU's here is the schematic of the lights ECU. Note I've made up the component identifiers as they aren't marked on the board I have.

I was initially confused by the connector wiring as the actual board didn't match a couple of the resources I found on-line. My assumption being that this ECU changed a bit. However, the pinout seems to tally with Low Res scan of section P found online. Specifically: (J57) LIGHTS CONTROL UNIT
Fortunately, the unit I have seems to be functional.
I was initially confused by the connector wiring as the actual board didn't match a couple of the resources I found on-line. My assumption being that this ECU changed a bit. However, the pinout seems to tally with Low Res scan of section P found online. Specifically: (J57) LIGHTS CONTROL UNIT
Fortunately, the unit I have seems to be functional.
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