PF Auto Lights Retrofit (G399 not G397)

ulfilias · #1 18th October 2016, 04:06 PM

Hi there,

I've been looking at the Auto Lights option on my 2005 PF D3 as a retrofit idea. Mainly because of the irksome beeping of the "Press stop to engage wheel lock" means then when i've used my lights in the daytime, it's very easy to forget to turn them off.

It seems that the PF didn't have the Light/Rain Sensor (G397) but the G399 Light sensor.

I can find loads of info on the Light/Rain - http://www.jimellisaudiparts.com/pro...K0955559D.html

But no part number on the G399 Light Sensor!!!

It appears to plug into the roof module so probably needs a short cable on a retrofit, but we're talking a few inches rather then anything major. Sits in a pre fitted bracket on the windscreen above/behind my auto-dipping functions (Really you order a car with auto dipping but don't spring for the lights!!!)

The Light switch is a quick press in the centre and twist to the right and it pops out dead easy and plug in one with an auto switch (got and tried, alas 399 error, looked and no sensor/cable just bracket)

So Anyone know some useful part numbers as i'm drawing a blank?

Ta,
Lee

ulfilias · #2 26th October 2016, 12:57 PM

Hi There,

Went in and spoke to the Audi parts guy and we looked through the system. Keeps comming up with 8K0955559A which is rain and light sensor!

Picked up the cable for £11 which is 4E0970291 and will see at trying a rain and light sensor off ebay and see where I get to!

Lee

mcs · #3 14th November 2016, 12:54 PM

The light sensor is not a separate part sadly.

I found one a while back but since I couldn't sell it I gave it away.

The cable for the rain sensor is also for the light sensor but with an adapter.

I have retrofitted both and it's easy enough to do the rain sensor too.

If you only want light sensor then look for humidity sensors and you may find a light sensor also.

ulfilias · #4 16th November 2016, 01:40 PM

I've already picked up the Window based light/rain sensor as that was supposed to be the part that the tech guys etk said for mine....However Rain was not an option on the PF D3 from what he said and I could see.....And yet the light sensor doesn't have a part apart from the rain/light sensor!!!

It's all very perculiar....I'm not sure what i'd be even looking for on a second hand humidity sensor to know if i've got the right on????

Lee

M-A8 · #5 16th November 2016, 05:25 PM

Hi Lee
I'm pretty sure there was only one type of light/rain sensor.
http://www.ebay.co.uk/itm/Original-A...IAAOSwnNBXY89I

I'll have a look what is it wired to in a minute

M-A8 · #6 16th November 2016, 05:37 PM

There is very little info about it I have to say.

Look like it plugs into front roof electronics unit and apart light switch with Auto function would that be it?
Would you possibly need a new roof electronics control unit with connection for the sensor??
There are CAN wires going to the roof unit so it's always possible that extra pair of CAN wires would come out from it (dedicated for the light sensor) and then go to CAN separating connector on the passenger side and possibly CAN Bus system would do the rest of the work - each time sensor sends signal to the CAN network that signal is picket up by the control head unit and switches the lights on as long knob is in Auto position.
???