Wiring for blue relay behind glovebox question

Need technical Q/A then you're in the right place

Moderator: martauto

User avatar
jimf
E30 Zone Regular
E30 Zone Regular
Posts: 627
Joined: Mon Mar 10, 2008 11:00 pm

Post Tue Jun 16, 2015 10:29 am

Hi folks,

I'm in the process of removing an aftermarket alarm which is going well but I have a question about this relay wiring.

I 'think' it is the window relay but the wiring doesn't correspond to any diagrams I can find. There is a blue/brown wire that comes from it and goes to a spade connector. This connector has two blue/brown wires and the other goes to a single white plug.

The spade connector 'was' fitted to the door microswitch but the diagrams say it should be a violet/brown wire. I found that wire and fitted it as I 'think' it should be but now don't know what the blue/brown wiring is for.

Also, while I'm asking questions, what is the box that goes next to the central locking module. The picture is from the internet. I have the plug but no box.

Image

Image

Image

Image
Image
Top
jslot
E30 Zone Regular
E30 Zone Regular
Posts: 456
Joined: Mon Oct 13, 2008 11:00 pm
Location: Isle of Man

Post Tue Jun 16, 2015 12:13 pm

The box next to the central locking module is the interior light delay unit.

That is all I know sorry!
Image
Top
User avatar
jimf
E30 Zone Regular
E30 Zone Regular
Posts: 627
Joined: Mon Mar 10, 2008 11:00 pm

Post Tue Jun 16, 2015 12:39 pm

Thanks jslot, seems a lot of wires for one little light! lol
Image
Top
User avatar
jimf
E30 Zone Regular
E30 Zone Regular
Posts: 627
Joined: Mon Mar 10, 2008 11:00 pm

Post Tue Jun 16, 2015 10:38 pm

Ok so it is the window relay. Just need to work out the blue/brown wiring now
Image
Top
User avatar
jimf
E30 Zone Regular
E30 Zone Regular
Posts: 627
Joined: Mon Mar 10, 2008 11:00 pm

Post Sat Jun 20, 2015 6:55 am

Anyone know what the blue/brown wiring is for?
Image
Top
User avatar
Brianmoooore
E30 Zone Team Member
E30 Zone Team Member
Posts: 49360
Joined: Mon Jan 10, 2005 11:00 pm

Post Sat Jun 20, 2015 11:15 am

You've caught me the best part of 1000 miles away from my E30 wiring diagrams, and on the slowest internet connection since before dial up. Your pics. would take about half an hour to download, so I'm going to have to guess!
Any wire with a brown tracer is one that something will happen if you earth it, and I think that your wire is probably the one that was connected to the door switch to operate the interior light if a delay module isn't fitted, so is now spare. If the windows work with a door open and the ignition off, and the interior light delay works as it should, then don't worry about it.
Top
User avatar
jimf
E30 Zone Regular
E30 Zone Regular
Posts: 627
Joined: Mon Mar 10, 2008 11:00 pm

Post Sat Jun 20, 2015 1:10 pm

Thanks Brian, Magpie (Mick) told me you were the man to speak to. I'm going to just try it an see once I get the rest of the loom back together again. I have tried hunting for the diagrams but can't find one that corresponds to the wiring colours for this relay. Where do you refer to for wiring?
Image
Top
User avatar
Brianmoooore
E30 Zone Team Member
E30 Zone Team Member
Posts: 49360
Joined: Mon Jan 10, 2005 11:00 pm

Post Sat Jun 20, 2015 4:11 pm

jimf wrote: Where do you refer to for wiring?
Good diagrams here: http://www.autolib.diakom.ru/CAR/BMW/ , but for US spec. cars. For UK cars I strip down old looms (and modules) and work out the diagrams the hard way!
Top
User avatar
jimf
E30 Zone Regular
E30 Zone Regular
Posts: 627
Joined: Mon Mar 10, 2008 11:00 pm

Post Sun Jun 21, 2015 7:48 pm

Thank you for that Will, it all makes sense now and I'm not sure I would have worked that out to make the windows power up with doors open.
Image
Top

Return to “E30 Technical Help”