A4 B7 dip beams come on with ignition only.

[Crasher]

If you fitted a Metzger 0916734 you are looking at a BCM J519 problem.

[liam walsh]

Yes a 0916734 metzger fitted, for info it feels more OEM that the VEMO but that's besides the point.
I might try checking continuity of the wires from the bcm to the switch before looking at a new used bcm, is coding in a used BCM difficult with VCDS? I have elsawin diagrams to identify the wires for con checks.

[Crasher]

The BCM is specific to the car, a Vehicle Intelligent Part but I think it is too early for component protection.

[liam walsh]

Saga continues ,

I replaced BCM J519 with a used BCM 8E0907279L ( my original was 8E0907279N but ETK shows as alternate ) . I checked coding on VCDS and both BCMs have the same coding..
Nil fix . Still getting E1 implausible signal but with the new BCM Switch E1 can now turn on and off the lights but turning on park lights turns on dins aswell. No other function works , still no full beams unless lever pulled back and no front or rear fogs.

So because i had it there i fitted the E1 switch that is not correct for the car per ETK p/n 8E0 941 531 A 5PR and with that installed full beams work as normal , fogslight front and rear work as normal but it doesn't turn off the lights , they can only turn off with ignition off. Also I noticed this particular switch p/n 8E0 941 531 A 5PR only does this with the new used BCM i fitted .

I'm not sure what to do next , what other module could be causing this or possibly wiring? 🤔

[Crasher]

The turn signal/dipped main switch or steering column controller.

[liam walsh]

The turn signal/dipped main switch or steering column controller.

Cheers Crasher. I'll keep at it.

[pdlh]

Just a thought, in the VCDS module, Central Electronics is there any way your car has been coded as 0xxx2 (Northern Countries) where I believe it’s law for their lights to be on all the time, (remember old Volvo cars from back in the 80’s 90’s when you used to see their lights on all the time). Any chance you car is coded so the lights come on as soon as you turn on the ignition because it thinks it’s from Scandinavia?

0?xxx: Light Sensor
0 = Light Sensor not installed
1 = Light Sensor installed
0x?xx: Trailer Hitch
0 = Trailer Hitch not installed
1 = Trailer Hitch installed
0xx?x: Headlights
0 = Halogen Headlights
1 = Xenon Headlights
0xxx?: Country
1 = Rest of World
2 = Northern Countries (Finland, Sweden, Norway, Denmark)
3 = USA
4 = Canada