Fuse 14 keeps blowing

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

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.

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...

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.

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

One of these:

might help.

Chris

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....

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

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.

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

Chris

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

Seem very expensive for what they are...

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

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

Chris

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.

Chris

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

Chris

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.

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

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.

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

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.

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.

Well done.

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.

Chris