HeywoodFloyd · May 31, 2017

Ok, so I've not got the horn. Well actually, I've got a horn, but there's nothing connected to it.

For whatever reason, one of the many POs of my 90 decided to disconnect it.

I've not had much luck reading up on what wires might be the right ones to reconnect, and so far I'm struggling to trace cables from the arm, to any sort of relay that might then head to the any of the numerous spare cables hanging about near the horn.

So, attached are photos the "unused" wires hanging about in the rough vicinity of the horn... do any of these look like they might be what I'm looking for? One is a lonely purple and green wire, the other is a bunch of wires (green, green+white, purple+white), and the other is a plug with 2 black wires and 1 green+black wire)

Or should I just start from scratch from the arm loom onward? Is there even a relay I should be looking for somewhere?

Any help appreciated.

Alan Crossley · May 31, 2017

I was going to suggest viagra, but clearly go the wrong end of the stick

. However, I have had a look in my Haynes manual and can't make any sense of the diagram for the horn, which could be different from model to model

Sorry I can't help

discomania · May 31, 2017

HeywoodFloyd said:
Ok, so I've not got the horn. Well actually, I've got a horn, but there's nothing connected to it.

For whatever reason, one of the many POs of my 90 decided to disconnect it.

I've not had much luck reading up on what wires might be the right ones to reconnect, and so far I'm struggling to trace cables from the arm, to any sort of relay that might then head to the any of the numerous spare cables hanging about near the horn.

So, attached are photos the "unused" wires hanging about in the rough vicinity of the horn... do any of these look like they might be what I'm looking for? One is a lonely purple and green wire, the other is a bunch of wires (green, green+white, purple+white), and the other is a plug with 2 black wires and 1 green+black wire)

Or should I just start from scratch from the arm loom onward? Is there even a relay I should be looking for somewhere?

Any help appreciated.

The horn connection, usually, is on the passengers side. It is a single blue or purple wire with a trace colour if I remember correctly and it is just a single wire as horn earths locally. So maybe it is that lone one you found, but seems to be on the wrong side, but they were always changing things!

HeywoodFloyd · May 31, 2017

Alan Crossley said:
the wrong end of the stick

Great pun though, what with the horn being on the indicator stalk, etc.

Yeah, the information out there is horrific - mines an early 1987 90 - and looking in my range of different manuals and workshop books, etc. it's as if no one would ever need to know this!

HeywoodFloyd · May 31, 2017

discomania said:
The horn connection, usually, is on the passengers side. It is a single blue or purple wire with a trace colour if I remember correctly and it is just a single wire as horn earths locally.

Oh, so my horn is on the drivers side, but I should be looking for something on the passenger side?!

If not, I wonder if it's just that purple+green wire then in one of my pictures - I'll wire it up tonight and earth locally and see what happens

discomania · May 31, 2017

HeywoodFloyd said:
Oh, so my horn is on the drivers side, but I should be looking for something on the passenger side?!

If not, I wonder if it's just that purple+green wire then in one of my pictures - I'll wire it up tonight and earth locally and see what happens

Well, I suspect that lone wire you found is the horn, it just "seems" to be on the wrong side.

discomania · May 31, 2017

Get the multimeter onto it while you push the horn button.

HeywoodFloyd · May 31, 2017

discomania said:
Well, I suspect that lone wire you found is the horn, it just "seems" to be on the wrong side.

It's amusing though, all these wires hanging about - everything except the horn works, so what are they all lol

HeywoodFloyd · May 31, 2017

discomania said:
Get the multimeter onto it while you push the horn button.

Yeah, I had considered this - might have to rope her indoors into helping me if I want to do that. She'll enjoy that... not.

discomania · May 31, 2017

There are lots of optional extras from the factory, or ROW spec electrical parts so a lot of these spares that seem to do nothing are tied into the.

My LR was fitted with a split charge loom from the factory, so it was interesting to note all the spilt charge connections are already there, you just need the heavier charge cable loom from LR and the relay.

discomania · May 31, 2017

HeywoodFloyd said:
Yeah, I had considered this - might have to rope her indoors into helping me if I want to do that. She'll enjoy that... not.

Sit the meter in the window, jam the red probe into the single connector and then jam the black somewhere it will get a good connection to earth.

jimwyllie · May 31, 2017

According to Haynes manual, cable to horn should be purple with black trace. On late models black earth should also come from horn, on older earth is through horn body. Take a look behind grill for cable

discomania · May 31, 2017

jimwyllie said:
According to Haynes manual, cable to horn should be purple with black trace. On late models black earth should also come from horn, on older earth is through horn body. Take a look behind grill for cable

Ah good, my mind does still remember these useless facts!

jimwyllie · May 31, 2017

Don't know about the others without poring over circuit diagrams, but purple with green should be fusebox to heater blower motor

zeaphod · May 31, 2017

As above, a single purple/black is the horn supply. Green with purple is listed as a stop lamp on my old chart.

discomania · May 31, 2017

jimwyllie said:
Don't know about the others without poring over circuit diagrams, but purple with green should be fusebox to heater blower motor

I think they made the wiring colours up as they went along! Depending what deal they could get on thinwall that week!

HeywoodFloyd · Jun 1, 2017

Well I found it, it was none of the ones I'd photographed!

It was however a purple wire on the passenger side, which had then been run all the way down to the front, connected to a piece of speaker wire, and routed round the front of the intercooler and radiator, and into the drivers side wing, and promptly cut off at some point!

At least the mystery is solved! Thanks dicsomainia for the passenger side hint, I would never have found it!

discomania · Jun 1, 2017

HeywoodFloyd said:
Well I found it, it was none of the ones I'd photographed!

It was however a purple wire on the passenger side, which had then been run all the way down to the front, connected to a piece of speaker wire, and routed round the front of the intercooler and radiator, and into the drivers side wing, and promptly cut off at some point!

At least the mystery is solved! Thanks dicsomainia for the passenger side hint, I would never have found it!

I was pretty certain it would be on the passenger side. The horn on mine is on the passenger side too.

HeywoodFloyd · Jun 1, 2017

discomania said:
I was pretty certain it would be on the passenger side. The horn on mine is on the passenger side too.

I think where this is a 300tdi conversion, a lot of things have been moved about to accommodate, the horns being one of them. I'd just assumed they were in the original location, more fool me.

Colthebrummie · Jun 1, 2017

I wonder why it was disconnected by a po and how has it been getting through mots? Hope it doesn't catch fire when you use it.

Col

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