front seat airbag - why 4 wires?

Goran · #1 2nd October 2013, 10:37 AM

Thanks, I will order a pair of controller-side connectors from A8parts, I'll need them anyway for a neat conversion.
Now just to figure out where the two brown earthing wires go from the D2 seat airbag (brown plug). Picture to follow tonight. If they just go to a earthing point in the car then no problem. If they go back to controller, then confusion. See Elsa doesn't have those wires on the diagram either. Maybe because they dont go anywhere?

notorious · #2 2nd October 2013, 03:20 PM

Earth goes only to car chassis

Goran · #3 2nd October 2013, 10:16 PM

Thanks Sergei,
So just to confirm, its the black plug from the airbag, that just goes to the chassis?
I cant find it in the Elsa wiring diagrams.

Thanks

notorious · #4 2nd October 2013, 10:47 PM

>> its the black plug from the airbag, that just goes to the chassis?

Sorry, I stopped understanding what picture means what. Picture with airplanes in background is D2 seat or TT seat?

What is this picture again? Part of TT seat?

Two ELSA diagrams are clear to me.

If we assume that picture with airplanes in background is D2 seat, then red 2-pin connector should be T2ay or T2az according to last ELSA diagram provided. It has two pins and it is red colour.

Then we have some earth wires on the picture, but it is not clear where they come from.

I appreciate earth wires go to black connector. I have no idea what black connector is. Black connector may not be relevant to airbags system.

Goran · #5 3rd October 2013, 11:19 AM

Sorry, I forgot to label the pictures. The airplanes picture is the D2 airbag.
sorry, bad quality picture, it has two brown wires to bolt to airbag casing, and these are spliced into the airbag loom, but have a separate black connector.
I may need to confirm with A8 parts where this goes in the car.
The confusing thing is that its not in the Elsa airbag diagram, even though wires bolt onto airbag.
Maybe as you suggest its just earthing wires, and maybe they are represented in a different Elsa diagram.

notorious · #6 3rd October 2013, 11:34 AM

Is black connector a single pin connector? If yes, it should connect airbag's local earth with global 'big earth' of the car chassis. Just like T1p or T1q connectors on D2 ELSA diagram.

Goran · #7 3rd October 2013, 01:19 PM

Thanks Sergei.
Its a 2 pin connector, but both wires appear to be earths? they both bolt on to airbag metal casing.
I may have to ask A8 parts if they know where those wires go in the car.