Defogger switch lamp Question

[Federico]

A simple one: When is the defogger switch lamp supposed to be on? Mine lights up only with the switch engaged.
Shouldn't it also light up together with the dash lights?

[tig]

A simple one: When is the defogger switch lamp supposed to be on? Mine lights up only with the switch engaged.
Shouldn't it also light up together with the dash lights?

Yes, it should be on dim with the dash lights.

[Federico]

A simple one: When is the defogger switch lamp supposed to be on? Mine lights up only with the switch engaged.
Shouldn't it also light up together with the dash lights?

Yes, it should be on dim with the dash lights.

TY, Much appreciated!

[Ju@n]

A simple one: When is the defogger switch lamp supposed to be on? Mine lights up only with the switch engaged.
Shouldn't it also light up together with the dash lights?

Yes! it should be dim with parking lights and full on with the switch engaged, i think there's a resistor and a diode or something similar inline, you could check that on the ETM those components are detailed

[Federico]

Well, I checked the internals of the switch, and other than a bit of corrosion everything was in order. Diode and resistor tested ok.





After cleaning the switch and reinstalling it, I was still getting no light with the dash lights on. The switch only illuminated when engaged, bright with dash light off and dim with dash lights on.

So, I decided to go scrutinize the euro diagrams:



By the looks of it, this switch is not supposed to light up unless it is engaged. I guess Early Euro E28 = Quirky as frig.

I'll add this to my top ten quirks list, together with the changeover relay that deactivates the rear fogs when the high beams are on.

[tig]

Dude. Where can I haz Euro diagrams like that?!?!?

[vinceg101]

Dude. Where can I haz Euro diagrams like that?!?!?

What he said...

[JohnH]

https://bmw-grouparchiv.de/

[Federico]

I got my hard copies from a gentleman in Germany a few years ago.
They consist of 3 books (Band 1;2;3), covering Euro versions, US, Japan, Taxi, Etc.

Apparently, you can now download pdf versions from the site that John posted. Nice!

[tig]

https://bmw-grouparchiv.de/

Holy s***.

Now to actually find the right diagrams...

[tig]

https://bmw-grouparchiv.de/

Holy s***.

Now to actually find the right diagrams...

Looks like it's AW-298-10.pdf..

posting.php?mode=quote&f=3&p=1491487

This gives me very warm feels.

Thank you.

[Dana in Reno]

I'll add this to my top ten quirks list, together with the changeover relay that deactivates the rear fogs when the high beams are on.

That might be because in some countries (France for sure) it's only legal to use the rear rain lights when it's actually raining...

[vinceg101]

https://bmw-grouparchiv.de/

I got my hard copies from a gentleman in Germany a few years ago.
They consist of 3 books (Band 1;2;3), covering Euro versions, US, Japan, Taxi, Etc.

Apparently, you can now download pdf versions from the site that John posted. Nice!

Duuudddeee!...this is truly awesome. THANK YOU!