Fuse 14 keeps blowing

[Matthews]

Hey up all :)

mk4 golf 1.6 8v 99

A week ago fuse 14 just blew which I found out when I had no electric
windows or interior lights, also the puddle light on the door was off and
the boot light was out. The central locking is off too so having to manually
lock the car.

So I found the blown fuse a week ago and replaced it and has been fine and
today it has blown again ?

No work has been done on the car.

I'm just wondering what could be causing this to blow and where I can start
beating the bush ?

Lol a bit of a nightmare with the heat having no open windows its like a
furnace in the car which is un drivable.

Thanks for any help it will be much appreciated.

[rp]

On Wed, 25 Jul 2012 00:08:15 +0100, Matthews wrote:

>I'm just wondering what could be causing this to blow and where I can start
>beating the bush ?

I'd guess a damaged wire in the loom to the door and opening/closing
the door causes a short.

--
Regards - Rodney Pont
The from address exists but is mostly dumped,
please send any emails to the address below
e-mail rpont (at) gmail (dot) com

[Chris Bartram]

The central convenience ECU is common to all of those systems. If you
have access to VCDS scan that controller: it may give you a clue with a
'short to ground' or similar error.

[Matthews]

"rp" wrote in message
news:ecbagvasbuvgsfargp...@ouse.infohit.me.uk...

On Wed, 25 Jul 2012 00:08:15 +0100, Matthews wrote:

>I'm just wondering what could be causing this to blow and where I can start
>beating the bush ?

I'd guess a damaged wire in the loom to the door and opening/closing
the door causes a short.

It does sound like a short to ground some where. Rubs chin...

[Matthews]

"Chris Bartram" wrote in message news:juo2mt$u2c$1...@dont-email.me...

I've checked the wiring going in to the boot which gets flexed every time
its opened no freyed wires on either side. I've also checked the wiring
going in to the doors.
I did check the CCM fuses on top of the battery and they are intact. Also
was told to check the wiring behind the interior light as the screw can
sometime penetrate that and its in tact.

Unfortunately I don't have or have access to VCDS.

I've had a look around all the common places, perhaps another look is in
order. There has to be a short somewhere. Although fortunately its not
popping straight away seems to last a week which is odd but its giving me
time to find it.

So far since replacing the fuse its ok.

I disconnected the battery overnight as a friend said sometimes the ccm can
store errors and and odd, I didn't hold on to that much but gave it a go
anyway as its was simple enough.

I wonder if the ccm could be the fault ?

I appreciate the post

[Chris Whelan]

On Wed, 25 Jul 2012 00:08:15 +0100, Matthews wrote:

[...]

> Thanks for any help it will be much appreciated.

One of these:

http://bit.ly/NuB8MY

might help.

Chris

--
Remove prejudice to reply.

[Chris Bartram]

On 25/07/12 12:41, Matthews wrote:

>
> I've checked the wiring going in to the boot which gets flexed every
> time its opened no freyed wires on either side. I've also checked the
> wiring going in to the doors.
> I did check the CCM fuses on top of the battery and they are intact.
> Also was told to check the wiring behind the interior light as the screw
> can sometime penetrate that and its in tact.
>
> Unfortunately I don't have or have access to VCDS.
>

>

It would be worth asking on one of the VAG forums (briskoda, audi-sport,
uk-mkivs etc). Someone will scan the car for you for a beer or two
usually....

[Rob]

On 25/07/2012 9:55 PM, Chris Whelan wrote:
> On Wed, 25 Jul 2012 00:08:15 +0100, Matthews wrote:
>
> [...]
>
>> Thanks for any help it will be much appreciated.
>
> One of these:
>
> http://bit.ly/NuB8MY
>
> might help.
>
> Chris
>

You can buy a lot of fuses for that price. My choice would be to solve
the problem.

[Rob]

There are so many things off that fuse its hard to pin point.

It could be water in the harness which dries out then works again.

One which comes to mind is where the boot light being out of its socket
shorting on the body.- this is an actual case. May be worth checking
each bulb in turn

But you don't should not have to pull the harness apart.

[Chris Whelan]

On Thu, 26 Jul 2012 10:48:54 +1000, Rob wrote:

[...]

> You can buy a lot of fuses for that price.

Indeed, but they make a useful addition to the toolbox for the future.

[tony sayer]

In article <juq45u$3f9$2...@dont-email.me>, Rob <mesa...@google.com>
scribeth thus

You can buy a few domestic MCB's for that price too!...

Seem very expensive for what they are...
--
Tony Sayer

[Chris Whelan]

On Thu, 26 Jul 2012 08:28:58 +0100, tony sayer wrote:

[...]

> You can buy a few domestic MCB's for that price too!...

Yep; why would there be a significant difference? Manufacturing and
distribution costs would be similar.

> Seem very expensive for what they are...

Bearing in mind the economies of scale that would be had by mains-rated
MCB's, they are actually quite cheap.

[Dave Plowman (News)]

In article <lX6Qr.170723$v24....@fx11.am4>,

I wonder about their longevity, being so small. Barely looks room for
suitable contacts.

--
*A fine is a tax for doing wrong. A tax is a fine for doing well*

Dave Plowman da...@davenoise.co.uk London SW
To e-mail, change noise into sound.

[Chris Whelan]

On Thu, 26 Jul 2012 10:29:22 +0100, Dave Plowman (News) wrote:

> In article <lX6Qr.170723$v24....@fx11.am4>,
> Chris Whelan <cawh...@prejudicentlworld.com> wrote:
>> On Thu, 26 Jul 2012 08:28:58 +0100, tony sayer wrote:
>
>> [...]
>
>> > You can buy a few domestic MCB's for that price too!...
>
>> Yep; why would there be a significant difference? Manufacturing and
>> distribution costs would be similar.
>
>> > Seem very expensive for what they are...
>
>> Bearing in mind the economies of scale that would be had by mains-rated
>> MCB's, they are actually quite cheap.
>
> I wonder about their longevity, being so small. Barely looks room for
> suitable contacts.

Yes, that might be a problem if used permanently, but my thoughts were
more to use them as an aid to fault-finding.

[Matthews]

"Chris Whelan" wrote in message news:Ov8Qr.170725$v24.1...@fx11.am4...

I had no idea about this product and think it is a great product especially
if used for situations like this to fault find then replace with a standard
fuse. I see it as a tool not a permanent solution. I ordered one till I can
get round to fault finding it some more which I have made no progress with
due to lack of time.

[Rob]

Bit of fencing wire bent in a U shape and the ends flattened lot cheaper!

[Dave Plowman (News)]

In article <jur898$44t$1...@speranza.aioe.org>,

Matthews <no...@here.com> wrote:
> I had no idea about this product and think it is a great product
> especially if used for situations like this to fault find then replace
> with a standard fuse. I see it as a tool not a permanent solution. I
> ordered one till I can get round to fault finding it some more which I
> have made no progress with due to lack of time.

Except that blade fuses cost perhaps 20p max.

--
*Why is the time of day with the slowest traffic called rush hour?

[Matthews]

"Rob" wrote in message news:jurf4v$ksj$1...@dont-email.me...

I not electrical wizz so I thought it sounds like a good idea.

How safe is the fencing wire idea ? (by no means was that ment in a funny
way, just curious) might come in handy in the future)

I managed to find the fault on the back of 2 of the wires on the back there
was the tiniest amount of cable exposed and touching another wire in the
same state. This was the loom going in to the boot hatch.

I have temporarily taped it up with electrical tape but it breaking is
inevitable whats the best way to fix this being in a constant use area ?

Thanks

[Chris Whelan]

On Thu, 26 Jul 2012 17:36:33 +0100, Matthews wrote:

[...]

> Bit of fencing wire bent in a U shape and the ends flattened lot
> cheaper!
>
> I not electrical wizz so I thought it sounds like a good idea.

It's a great idea. If you don't like your car, and are confident the
insurers won't find out when it's burnt to nothing.

> How safe is the fencing wire idea ? (by no means was that ment in a
> funny way, just curious) might come in handy in the future)

Under no circumstances should you attempt to defeat the circuit
protection provided by the designer. That applies to automotive,
domestic, industrial, or any other sort of electrical installation you
can think of.

> I managed to find the fault on the back of 2 of the wires on the back
> there was the tiniest amount of cable exposed and touching another wire
> in the same state. This was the loom going in to the boot hatch.

Well done.

> I have temporarily taped it up with electrical tape but it breaking is
> inevitable whats the best way to fix this being in a constant use area ?
>
> Thanks

Depends on how long you intend keeping the car. In the short term, tape
will be fine. Obviously, a 'proper' fix will require splicing in a new
loom.