Wiring Quiz 😂

s8ndst0rm · Dec 28, 2024

Still working my way through the rats nest of wiring in the 90 200 TDI.

I have various wires I need to identify (or rule out of caring about).

I’ve sorted a bunch through elimination but have various things just not plugged into anything.

I’ll post in separate replies to allow people to reply to each one.

s8ndst0rm · Dec 28, 2024

Two wires behind the brake servo (green into red/black)

Where should these route to internally?

s8ndst0rm · Dec 28, 2024

Green wires, behind binnacle, not plugged into anything.

s8ndst0rm · Dec 28, 2024

Purple wires, left hand stalk, cut off

s8ndst0rm · Dec 28, 2024

Two relays behind the fuse box. Nothing seems to stop working if they’re removed.

Phill · Dec 28, 2024

You don't have a wiring diagram?

Hicap phill · Dec 28, 2024

s8ndst0rm said:
Two relays behind the fuse box. Nothing seems to stop working if they’re removed.

The 1 with the big brown cable should be a starter relay.
Unsure about the other
5 pin relays should be fitted

Hicap phill · Dec 28, 2024

s8ndst0rm said:
Purple wires, left hand stalk, cut off

Get them checked. Purple is live
Head light flash/horn If off the left stalk.

s8ndst0rm · Dec 28, 2024

Phill said:
You don't have a wiring diagram?

Waiting for one coming from eBay

Hicap phill · Dec 28, 2024

s8ndst0rm said:
Two wires behind the brake servo (green into red/black)

Where should these route to internally?

They look like left hand drive heater motor cables(plug)

Are the others brake light switch ?

bluedog333 · Dec 28, 2024

s8ndst0rm said:
Green wires, behind binnacle, not plugged into anything.

They should be plugged into the indicator

bulb on the dash light board.

dag019 · Dec 30, 2024

s8ndst0rm said:
Purple wires, left hand stalk, cut off

Theses are the the two purple ones that you can see in the foreground with the pink but connectors attached to red wires. Where does the rest of the red wire go? Purple and black is the horn so guessing this is the horn circuit and an separate horn switch has been added somewhere else on the dash?

dag019 · Dec 30, 2024

s8ndst0rm said:
Waiting for one coming from eBay

I know it is for a 300tdi specifically but most of the colours are the same so may be useful in identifying things: LINK

dag019 · Dec 30, 2024

s8ndst0rm said:
Two relays behind the fuse box. Nothing seems to stop working if they’re removed.

The top one looks like it should be the starter relay based on the wiring colours (brown, red/white wires) but that should mean it doesn't start when it is removed so I may be wrong there.

The lower one looks like it should be for the heated rear screen based on the wirirng colours (black/white wires).

s8ndst0rm · Dec 30, 2024

dag019 said:
Theses are the the two purple ones that you can see in the foreground with the pink but connectors attached to red wires. Where does the rest of the red wire go? Purple and black is the horn so guessing this is the horn circuit and a separate horn switch has been added somewhere else on the dash?

Horn was totally goosed so I’ve fitted a new one on a new circuit to be sure.

s8ndst0rm · Dec 30, 2024

dag019 said:
The top one looks like it should be the starter relay based on the wiring colours (brown, red/white wires) but that should mean it doesn't start when it is removed so I may be wrong there.

The lower one looks like it should be for the heated rear screen based on the wirirng colours (black/white wires).

You’re right about the starter. Removing it prevents it starting. Other one doesn’t seem to impact anything (and I don’t have a heated rear screen) so it’s probably redundant.

dag019 · Dec 30, 2024

s8ndst0rm said:
You’re right about the starter. Removing it prevents it starting. Other one doesn’t seem to impact anything (and I don’t have a heated rear screen) so it’s probably redundant.

If you don’t have a heated rear screen that would be why it doesn’t impact anything. The looms were the same it just depended if you had anything on the other end. I have mine all wired in as I used to have a heated screen (but never used it) and currently don’t. So full loom, relay and switch are in place but the plug connector at the back doesn’t connect to anything.

Hicap phill · Dec 30, 2024

s8ndst0rm said:
You’re right about the starter. Removing it prevents it starting. Other one doesn’t seem to impact anything (and I don’t have a heated rear screen) so it’s probably redundant.

If it’s an early glass fused motor that other relay could be the high beam/fog light override.
Check high beam works
Check fog works
Really won’t allow the use of both at the same time but needs to be fitted(5pin)

s8ndst0rm · Dec 30, 2024

Hicap phill said:
If it’s an early glass fused motor that other relay could be the high beam/fog light override.
Check high beam works
Check fog works
Really won’t allow the use of both at the same time but needs to be fitted(5pin)

High beam and rear fog light both don’t work (neither does flash). New relay may be needed.

Hicap phill · Dec 30, 2024

s8ndst0rm said:
High beam and rear fog light both don’t work (neither does flash). New relay may be needed.

What type of fuses is your motor? Old glass or later blade

Check the flash/stalk for the colour… it may be purple on the switch side

Wiring Quiz 😂

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