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thesmithsUK
Monza


Joined: 07 Dec 2014
Posts: 230
Location: Cornwall


PostPosted: Sat Mar 03, 2018 5:10 pm    Post subject: How to test horns? Reply with quote

Is there an easy way to test whether a horn is working?

Just liberated these from the car this afternoon.

The spade connections all seemed OK (at the wheel hub and the horns themselves). And the fuse is intact.

One of them occasionally works. But only occasionally.


_________________
1990 964 C4 Cab | Manual | Brilliant Red Metallic
1984 Ferrari Mondial QV Coupe | Manual | Argento Silver + Bordeaux
1984 924 2.0 N/A Black | Black
Ex 2004 996 C4S | Manual | Seal Grey
Ex 1991 TVR 450 SEAC | Manual | Cureton Green
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14296
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sat Mar 03, 2018 5:14 pm    Post subject: Reply with quote

jump leads on your battery and the other ends on the spades. Makes sure you do + to +
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 7868
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Sun Mar 04, 2018 12:30 am    Post subject: Reply with quote

As said put earth and 12v through them and that will test if they work or not.

I had an issue with one (low tone) on my 996, thought it had broke so bought a new one, bumper off and fitted it to find it also didn't work, traced it to the connector having a bad connection.
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14296
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Mar 04, 2018 8:38 am    Post subject: Reply with quote

When mine have seized up or sounded like a throttled cat, I've just sprayed a load of wd40 down the spout and let it soak for 10 minutes. Always brought back to life.
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maldren
Österreich


Joined: 07 Oct 2016
Posts: 923



PostPosted: Sun Mar 04, 2018 9:26 am    Post subject: Reply with quote

Protect your ears before testing....
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2003 996.2 C2 Coupe Arctic Silver
 
  
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thesmithsUK
Monza


Joined: 07 Dec 2014
Posts: 230
Location: Cornwall


PostPosted: Sun Mar 04, 2018 4:04 pm    Post subject: Reply with quote

Armed myself with a digital multimeter...

Switch at steering wheel - fine. Fuse - fine.

One of the tones is dead (no continuity, no sound when wired direct to battery). The other one is intermittent. Cleaned up the connectors, tested (positively) for continuity, also worked when connected direct to battery. So, connected it back up - and it worked. Twice. Then nothing.

Disconnected it. No continuity. Took it apart. Reassembled it. Tested (positive) for continuity. Back in situ. Worked. Once!

Though I guess I could get my soldering iron out and try this: http://p-car.com/diy/hornrepair/

I'm minded just to order two new tones!
_________________
1990 964 C4 Cab | Manual | Brilliant Red Metallic
1984 Ferrari Mondial QV Coupe | Manual | Argento Silver + Bordeaux
1984 924 2.0 N/A Black | Black
Ex 2004 996 C4S | Manual | Seal Grey
Ex 1991 TVR 450 SEAC | Manual | Cureton Green
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14296
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Mar 04, 2018 4:06 pm    Post subject: Reply with quote

Yep - that's what happens when you don't squirt some wd40 down the spout to free up the farty bit inside.
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14296
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Mar 04, 2018 4:08 pm    Post subject: Reply with quote

Also helps if you adjust the tone screw whilst testing but you need to leave the horn blasting whilst you do it. Shove a rag down the spout so not to annoy the wife or neighbours.
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thesmithsUK
Monza


Joined: 07 Dec 2014
Posts: 230
Location: Cornwall


PostPosted: Sun Mar 04, 2018 4:39 pm    Post subject: Reply with quote

alex yates wrote:
Yep - that's what happens when you don't squirt some wd40 down the spout to free up the farty bit inside.


Will give that a try now...before I spend £140!
_________________
1990 964 C4 Cab | Manual | Brilliant Red Metallic
1984 Ferrari Mondial QV Coupe | Manual | Argento Silver + Bordeaux
1984 924 2.0 N/A Black | Black
Ex 2004 996 C4S | Manual | Seal Grey
Ex 1991 TVR 450 SEAC | Manual | Cureton Green
 
  
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Magic919
Österreich


Joined: 05 Jun 2013
Posts: 875
Location: Berkshire


PostPosted: Sun Mar 04, 2018 5:20 pm    Post subject: Reply with quote

That sound expensive. Dearer than 997 horns.
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thesmithsUK
Monza


Joined: 07 Dec 2014
Posts: 230
Location: Cornwall


PostPosted: Sun Mar 04, 2018 5:36 pm    Post subject: Reply with quote

thesmithsUK wrote:
alex yates wrote:
Yep - that's what happens when you don't squirt some wd40 down the spout to free up the farty bit inside.


Will give that a try now...before I spend £140!


Have taken the trumpet off and opened the unit up. Might actually give this a try before ordering new: https://p-car.com/diy/hornrepair/
_________________
1990 964 C4 Cab | Manual | Brilliant Red Metallic
1984 Ferrari Mondial QV Coupe | Manual | Argento Silver + Bordeaux
1984 924 2.0 N/A Black | Black
Ex 2004 996 C4S | Manual | Seal Grey
Ex 1991 TVR 450 SEAC | Manual | Cureton Green
 
  
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maldren
Österreich


Joined: 07 Oct 2016
Posts: 923



PostPosted: Sun Mar 04, 2018 5:39 pm    Post subject: Reply with quote

Magic919 wrote:
That sound expensive. Dearer than 997 horns.


Bet they're not Porsche specific, anyone know what other cars share the same horns? Is there a part number on them?
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5355
Location: Brighton


PostPosted: Sun Mar 04, 2018 6:39 pm    Post subject: Reply with quote

The original ones are not very cheap .

It depends on how original you want the car to be .. any 2 spade horn will fit and if you want the two tone you could still fit 996 ones , have to get the wiring plugs as well for 996 ones as they are not a standard spade connection .


http://www.design911.co.uk//fu/prod12877/Horn-Low-High-Pitched-Porsche-911---928---964/?imt=1&utm_campaign=uk+shopping&utm_source=adrac&utm_medium=cpc&utm_content=
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Last edited by deMort on Mon Mar 05, 2018 5:33 pm; edited 1 time in total
 
  
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thesmithsUK
Monza


Joined: 07 Dec 2014
Posts: 230
Location: Cornwall


PostPosted: Sun Mar 04, 2018 8:54 pm    Post subject: Reply with quote

Hmmm...half the price. Tempting. But what would the purists say?! At least they'd hear me coming.
_________________
1990 964 C4 Cab | Manual | Brilliant Red Metallic
1984 Ferrari Mondial QV Coupe | Manual | Argento Silver + Bordeaux
1984 924 2.0 N/A Black | Black
Ex 2004 996 C4S | Manual | Seal Grey
Ex 1991 TVR 450 SEAC | Manual | Cureton Green
 
  
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maldren
Österreich


Joined: 07 Oct 2016
Posts: 923



PostPosted: Mon Mar 05, 2018 8:59 am    Post subject: Reply with quote

There are cheaper still on ebay if you want to experiment.
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5355
Location: Brighton


PostPosted: Mon Mar 05, 2018 5:36 pm    Post subject: Reply with quote

Hmm ..

http://www.design911.co.uk/fu/prod13655/Porsche-Horn-Low-High-Pitched-92863522200-92863522101/

Standard spade connection on these .. and who is going to see them after all !
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thesmithsUK
Monza


Joined: 07 Dec 2014
Posts: 230
Location: Cornwall


PostPosted: Mon Mar 05, 2018 9:18 pm    Post subject: Reply with quote

Demort wrote:
Hmm ..

http://www.design911.co.uk/fu/prod13655/Porsche-Horn-Low-High-Pitched-92863522200-92863522101/

Standard spade connection on these .. and who is going to see them after all !


Good call!
_________________
1990 964 C4 Cab | Manual | Brilliant Red Metallic
1984 Ferrari Mondial QV Coupe | Manual | Argento Silver + Bordeaux
1984 924 2.0 N/A Black | Black
Ex 2004 996 C4S | Manual | Seal Grey
Ex 1991 TVR 450 SEAC | Manual | Cureton Green
 
  
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thesmithsUK
Monza


Joined: 07 Dec 2014
Posts: 230
Location: Cornwall


PostPosted: Mon Mar 12, 2018 8:01 pm    Post subject: Reply with quote

I ended up ordering two new (944) horns from Porsche Exeter - just £46.99 for both, including VAT and delivery! (And my 10% PCGB discount.)

Part numbers: 944.635.205.00 and 944.635.206.00 for future reference.

I also replaced the horn contact ring (a screw and plastic spacer were missing from the original) with this from Germany: https://www.fvd.net/de-en/100498F60102/repair-part-atiwe-horn-contact-ring-formula-steering-wheels.html

Just connected it all up and all working perfectly!

Thanks all for your help and advice (as always).
_________________
1990 964 C4 Cab | Manual | Brilliant Red Metallic
1984 Ferrari Mondial QV Coupe | Manual | Argento Silver + Bordeaux
1984 924 2.0 N/A Black | Black
Ex 2004 996 C4S | Manual | Seal Grey
Ex 1991 TVR 450 SEAC | Manual | Cureton Green
 
  
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stuttgartmetal
Indianapolis


Joined: 23 Feb 2009
Posts: 2374
Location: Caterham. Surrey


PostPosted: Tue Mar 13, 2018 11:01 pm    Post subject: Reply with quote

I’ve got a spare pair in my shed.
 
  
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thesmithsUK
Monza


Joined: 07 Dec 2014
Posts: 230
Location: Cornwall


PostPosted: Sun Oct 07, 2018 3:43 pm    Post subject: Reply with quote

Need some advice...

Both horn tones suddenly stopped working.

Found that the fuse (Number 3) had blown.

Simple.

Put a fresh one in (also 15A) but nothing. This new fuse had immediately blown!

I'm guessing the culprit could be the relay? (Number 23 according to the diagram on my fusebox lid.)

Can anyone help?
_________________
1990 964 C4 Cab | Manual | Brilliant Red Metallic
1984 Ferrari Mondial QV Coupe | Manual | Argento Silver + Bordeaux
1984 924 2.0 N/A Black | Black
Ex 2004 996 C4S | Manual | Seal Grey
Ex 1991 TVR 450 SEAC | Manual | Cureton Green
 
  
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