Any chance you could explain this a bit better, as I'm an idiot, and having the same issue, I'll have to explain it to my mechanic to rectify for me ? Would be much appreciated.
I've yet to put it into practice on the functioning lamp (too damned wet lately!) ...
In essence though:
- remove lamp unit
- remove cover with the three screws
- possibly need to disconnect the igniter from the bulb
- to the side of the bulb housing, you'll see a small plug with 4 wires going into it (Blue / Red / Brown / Black on the one I have)
--- Consider those two pairs left and right
--- Swap one pair only (so the wires that were 1,2,3,4 are now 2,1,3,4 or 1,2,4,3), shouldn't matter which pair you swap around
--- to do that - the plug itself can be opened (gentle here!) - and the pins removed cleanly, makes for a clean reassembly !
Put it all back together, and it should "just work" (TM)
Stepper motors are strange things - swapping the direction of one coil only (as opposed to all the wires) causes them to spin the other direction, and is effectively what we've seen on ours ... swap them both and it'll be as if nothing happened!
Hope that helps