Headlight re-wiring ( 2013 796 Ducati monster )

On the HS it is not very clear how it is wired, internally, but from the circuit diagram.
1 Yellow/ White - to instrument panel Low beam
2 Yellow/ Green- to instrument panel High beam
3 Yellow - goes to tail light/ number plate light & immobiliser ( I guess +12v when ignition on, for sidelights)
4 Black - negative.

Bike-
(On the HS -key in/ on brings on sidelights (DRL's). Engine on brings low/ high beam [can someone confirm - I'm riding my desk now!])

I would put voltmeter to bike, with the -ve side to black. Check for +12V on the wires. Ignition on -check for +12V.
Engine on -test for +12v on wires with low beam and high beam selected from switch.

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If I had to make a wild guess at the replacement light, something like-
black - negative
yellow/ blue - indicators
white/ red - low/ high beam
grey - sidelights.(?)

Its a fair guess that black is negative. Try +12v on the others of the new light to check which is which.

Take my advise with caution, as I can talk rubbish sometime, like many on the internet.

-A

Afterthought-
That's advice not advise.
Caution always, but nothing I said should do any damage.
My guessed colours could be out of synch. looking at the spade connectors on Y W R.
If -ve to black and +12V to colours don't light anything, then -ve must be a different colour.
I said 'Immobiliser' - more like ignition switch - the two are together on the circuit diagram.

Looks like the wires into the existing headlight are-
Yellow Brown is high beam from (Title DIMMER) and (PASSING (aka flash the high beam))
White is low beam from (Title DIMMER)
Yellow is side(on constant) and parking light from (02 ignition switch)
Black is negative on all lights.

Is this from the new unit?-
"I'm reading the blue is high beam, the grey is low beam and the black is negative (headlight)"

So Yellow, red, white, I would say, are the 2 indicators and 1 side/ park light and use the same black Negative.

Reckon?

A

Good to see progress.

"All work but the constant on the day light. Does it only turn on when bike is running ? "

Mmmmaybe. Probably. (I can't remember on the HStrada!)

Looking at (02) on the diagram - the Ignition switch
In the PARK position, it connects a Red wire to the Yellow wire that goes to the day light.
In the ON position, it connects an Orange wire to it.

I don't know what makes that Orange +12V - It could be from engine running

Did you test it with the key in the park position?

-A