BruceTF135 replied to the topic 'Mystery plug' in the forum. 3 days ago

My bad, the wires are actually brown / black which is live with ignition & a black earth. Did Japan spec have anything different, my headlights have rover Japan part stickers but I dont have any history for the car to confirm. 
 
Are you sure that isn't orange/black?  Brown is usually much darker.

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