Need an electrics guru

A bit of a mess under my dash. I was only planning to update the stereo!


Any idea what this is (blue and brown wires into the brown plug)? it says: â€Siemens155 035 439 and ends up near the stereo (not connected to anything).










Is this dash light supposed to be soldiered to wires?




It connects to this switch plug


And ends up at the dash connector
:

This goes into the hole at the top:



Found this on the floor:




Should these connect at the same time or does should you be able to use the wiper then pull further for the squirty?


Can this be opened?


This red wire goes to the stereo which may explain why it comes on with the lights. Is that normal? The stereo also comes on with the ignition. How would that work?








Thanks for any help.

Well the spring is from the glove box.  It is what holds the glove box open when you open it.



The smaller white connector looks like the defroster connector, if there is a black/yellow wire on it then that is the Defroster.  Connecting a wire to the black/yellow is the one folks usually tap for a Switched Power to the Stereo.

Solder/heat shrink is the better way to splice in to wires as the crimp AMP connectors are ok, but they fail….A good solder joint never does, and wires can't be pulled apart.

There are plenty of threads on the heater controls and how to repair the bulb.  I have done it, and well I sawed it flat off the back, and remove the bulb, then using small drills and Dremel trimmed what I needed to replace it with a Super Bright led, that I soldered to the connector wires, then used JB-Weld to affix it.  I also found that the Super Bright LED was so bright that I had to wrap the body of the lamp holder to keep the white light stay in to the plastic.



There are better how-tos on the interweb.
here is the one where I saw it off.
Just picked up a cabby, have some lighting questions. | VW Vortex - Volkswagen Forum

The one I really liked and duplicated.
https://forums.vwvortex.com/showthread.php?7081949-88-Cabby-Heater-Control-With-Non-Removable-Bulb-Mod&highlight=replacing+heater+control+light



The wiper stalk is an easier fix, as just replace it.
The contacts can get burned or mal-adjusted and the washer doesn't work.

Here is my tried and true quick fix for re-aligning them on the stalks.
Is it my Wiper switch of my windshield pump acting up? | Volkswagen Owners Club Forum

The bulb should have a Ground on one side that is Brown, and a blue/gray or is it gray/blue….?  I don't know where it is coming from.

The blue wire that is tucked in to heat shrink is a good way to terminate a cut wire and to insulate it from shorting out if it is carrying a live wire.

Hope this helps.

You're a star!

The stereo is working. Shorting the handbrake sensor to ground seems to have overridden the safety features too

There is an extra wire which is: "connect to car's illumination signal"
I guess it wants to know when the lights are on. Any thoughts on a good place to pick that up from?

If your head unit needs it then you splice in to the blue/gray or gray/blue wire off any light bulb.

Cheers, will try that tonight.

I'm still somewhat confused as to why my instrument bulb has wires connected to it when no-one else's does