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Spare wire / connector !!!!

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Hi all

Hoping someone will be able to tell me what the 'spare' wire is in the picture below?  The previous owner obviously felt this wasn't required but surely vw know better….

Thanks in advance guys

Wes


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if its brown and black wire, probably heated washer jet

Hello my name is John and I'm a dub addict.



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Looking at your picture it seems someone has fitted an early type fuel filter and fitted a cable tie?

The give away is the screw in spacer at the inlet end.

I believe your car should have the later bigger filter which is cheaper to buy for some reason.

Looks like this.


Something else you may want to remove is the headlight dim dip resistor, it's just behind the suspension top mount, size of a packet of polo and has 2 yellow wires going to it, if you follow the wire down underneath your coolant expansion bottle it will just unplug then you can unclip the resistor from the mount.

They can catch fire if they go faulty and they are not really needed as all they do is dimly light the main headlight bulbs when the side lights are on, you will have a 4w bulb in the lights already doing this job for you.

Also if you do upgrade the headlight loom to a relayed type you may find the side lights don't work with resistor fitted.

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, Daily drive. 283,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR. Weekend toy.

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Spare wire / connector !!!!

rubjonny said

if its brown and black wire, probably heated washer jet
It is brown and black.  Heater washer jet?! That is posh my daily doesn't have that (as far as I know anyway). That makes sense re the location and length of the wire. Thanks


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Spare wire / connector !!!!

mark1gls said

Looking at your picture it seems someone has fitted an early type fuel filter and fitted a cable tie?

The give away is the screw in spacer at the inlet end.

I believe your car should have the later bigger filter which is cheaper to buy for some reason.

Looks like this.


Something else you may want to remove is the headlight dim dip resistor, it's just behind the suspension top mount, size of a packet of polo and has 2 yellow wires going to it, if you follow the wire down underneath your coolant expansion bottle it will just unplug then you can unclip the resistor from the mount.

They can catch fire if they go faulty and they are not really needed as all they do is dimly light the main headlight bulbs when the side lights are on, you will have a 4w bulb in the lights already doing this job for you.

Also if you do upgrade the headlight loom to a relayed type you may find the side lights don't work with resistor fitted.

Thanks will check out the resistor.


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I'm going on the advice from rubjonny about the resistor as he knows alot about electrics unlike me.
I unplugged mine last year and everything still works fine, just no longer a dim H4 bulb in the head light and my car was ok for the MOT.

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, Daily drive. 283,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR. Weekend toy.

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theres no problem with it as such, its just if one of the wires to the resistor snaps and shorts on the chassis your headlight switch loom will melt. plus if you have a relay headlight loom fitted then you will loose the sidelights

its a worse problem on the mk2 golf because VW routed the wiring to it really poorly, it passes over a lip on the edge of the chassis leg with a plastic clip used to hold it away,. the clips go brittle after a few years and snap, then wires drop on the lip and start rubbing thru

though on the mk1 theres a different issue with it, the 2 pin plug for the dimdip resistor loom is right next to the spare fog light connector and will plug right in. if you do that then poof, crispy headlight switch loom :lol:

Hello my name is John and I'm a dub addict.



My wiring diagrams and other documents have moved here:

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