MK5 golf fuses

[davidno64]

Has anyone got details on fuse locations,
for VW Golf MK5. Mine is a diesel GT

3 months after new, my car would not start, this was the next morning after fitting or positioning a full alarm system. Not yet wired in, only fitted. I was shure I did not disturb anything after removiong part of the dash. All went back together well.
But when starting next morning, the motor would only crank.
Checked all fused OK. And A gripe, VW has no legend discribing what fuse is what. Anyway checked them all, to be OK.
Had the car towed to VW.
Thair diagosis, was a missing fuse, actually 2.

Cannot complain, at short notice, a tow, loan vehcle and repair?
They replaced both fuses, Which were in the engin bay. 1 fuse was for the starting, the other unknown. When asked, VW did not know what cct. these fuses were for. In fact they do not have a legend for fuse locations

Anyway I know for a fact one of these 2 fuses were not in the car from new. Of course there were a few spare positions unused. The fuses were tested and replaced one by one after not starting. Then I called VW. So I cannot see loosing any fuses, but I could imagine a possible incorrect position.

The symptoms were constant cranking with no starting, and an error on the MFD. The gear selection display was flashing. Vw put on computer and replaced fuses that were faulty (or not even there). All is fine now.

But rechecking the hand book. Only some of the fuses are dicribed in the book. Of course not the ones that I'm interested in. I find it amazing that the fuses are not identifyed by a legend or in the book. They are numbered but function unknown.

Does any one have full details on fuse position and function. I find it hard to belive that fuses magically disappearand that the dealers do not know postion/function of all the fuses. The cars Ok, exept now I found the MFD does not keep trip distances or time after being stationary. I fitted 10A fuses in all the blanks and now the MFD keeps it's memory. The fuses are now all populated, but when new only was about 75% populated (and everything was working)

Any thoughts or info. Otherwise exelent car.

[Maverick]

Does any one have full details on fuse position and function. I find it hard to belive that fuses magically disappearand that the dealers do not know postion/function of all the fuses. The cars Ok, exept now I found the MFD does not keep trip distances or time after being stationary. I fitted 10A fuses in all the blanks and now the MFD keeps it's memory. The fuses are now all populated, but when new only was about 75% populated (and everything was working)

Any thoughts or info. Otherwise exelent car.

There are two memories for the trip computer, long term and short term, fitting fuses did nothing, you've selected the long term memory. RTFM.

Fitting 10 amp fuses to the blanks is absolutely pointless and will only confuse anyone working on your car! Any circuits that require power will have them fitted.

The dealers do know the positions of the fuses and most of it is detailed in the manual. I have a list of them all around somewhere that I'll post if I find it.

[davidno64]

Without knowing the cars Cct's, populating the fuse positions is what got the MFD memory up and working. I don't know anything about short and long term memory but will read thr Manual again (nothing else had been changed).
I,ll ring VW and advise them of this memory issue. I suspect they had left out a fuse or put one in the wrong position.
Any info in regards to the fuses, positions or Cct's would be greatly appreaciated.

[Maverick]

Without knowing the cars Cct's, populating the fuse positions is what got the MFD memory up and working. I don't know anything about short and long term memory but will read thr Manual again (nothing else had been changed).
I,ll ring VW and advise them of this memory issue. I suspect they had left out a fuse or put one in the wrong position.
Any info in regards to the fuses, positions or Cct's would be greatly appreaciated.

Once again there is NO fuse specifically for the MFD memory!

There ARE short and long term memories for the MFD, what you have done is switched between them (you will see a 1 and 2 on the display).

The only fuse in E-box High (the one next to the battery) relating to the cluster is the fuse for the whole cluster which is SB17 a 5amp fuse for the Instruments Cluster Control Module.

As for fuses being put in the wrong location this is most likely a owner error, it's not possible for a car to pass any form of checking whether it be at the factory or vagcom/vcds or dealer tool with circuits without power. Nor would it be possible for the owner not to notice. Unless you took photos before and after you do work on the fuse box it's very easy to put them back in the wrong place. The fuses in that box often cover multiple systems for example the SB3 a 20A fuse which protects the Comfort System Central Control Module and the Front Passengers Wiper Motor.

Ringing VW will only provide them some entertainment so it's your choice!

[davidno64]

Cannot comment on what/if any fuse controlls MFD memory (includes clock). All I know populating the fuse box fixed the problem. I am aware of the mem1 and mem2 positions. That was not the situation, which also does not affect the clock.
Again I conceed to the slim possibility of incorrect fuse positions. But that does not explain why there were 2 fuses missing, not mispositioned. This fuse box was not even touched untill after the car would not start.
During this process the steering volume controll stoped working. But a power reset fixed this (removing batt negative).

Anyway spoke to VW today. They agreed to the reset via batt negative (will not affect other Cct's) and they could not give info, or even a car to compair to, as being mine being a diesel GT.
VW is currently in the process of trying to get me this fuse info, via Sydney or Germany? As the dealer rely on the dianostic software and the tech's personel knollage and ability.
I suspect the missing fuse's were partly correct but one was installed in the wrong position. But untill I get all the details, I may be wrong.

[GTI_racer]

During this process the steering volume controll stoped working. But a power reset fixed this (removing batt negative).

Could this possibly be when your memory was cleared?

[Maverick]

Cannot comment on what/if any fuse controlls MFD memory (includes clock). All I know populating the fuse box fixed the problem. I am aware of the mem1 and mem2 positions. That was not the situation, which also does not affect the clock.
Again I conceed to the slim possibility of incorrect fuse positions. But that does not explain why there were 2 fuses missing, not mispositioned. This fuse box was not even touched untill after the car would not start.
During this process the steering volume controll stoped working. But a power reset fixed this (removing batt negative).

This all comes back to the original install of the alarm, you say it wasn't connected but only put in place but clearly for multiple fuses to fail, the steering wheel controls to stop working and the car to not start something happened.

Anyway spoke to VW today. They agreed to the reset via batt negative (will not affect other Cct's) and they could not give info, or even a car to compair to, as being mine being a diesel GT.

When did the steering wheel controls stop working? At the time the other problems occurred? Has the alarm been installed now? What is the purpose of the alarm and does it interface to the car remotes?

VW is currently in the process of trying to get me this fuse info, via Sydney or Germany? As the dealer rely on the dianostic software and the tech's personel knollage and ability.

The dealer has access to the information through ELSA.

I suspect the missing fuse's were partly correct but one was installed in the wrong position. But untill I get all the details, I may be wrong.

My advice is to get someone who has a good knowledge of the Mark V Golf do the install, you can seriously screw your car up with some inadvertent connections and cause thousands of dollars in damage.

[davidno64]

The alarm is a mongoose MAP70 and has no direct inpact on the problem, as unit is not wired up. By the way this is a CANBUS alarm, specifically programmed for the Golf. It uses the factory remotes and only adds funmctions to the cars original immobiliser.

The steering volume only faulted after VW looked at the car (not before). Resetting this cleared it OK. The 2 fuses were replaced by VW, as missing items. No one had been under the bonnett previously (to my knollage) to do anything. So somehow 2 fuses misteriously disappeared?
But the point I'm chasing is quite simply identification of all fuses. Then if anyone else has heard of simlar problems.

I take VW at thair word, that they replaced 2 fuses. And they were totally missing, either someone got under the bonnet and removed them (mysteriously after I had worked on, inside the dash area). Or they were never there, which I know one fuse for a fact was not there from new. When I took delivery, I inspected the car and familiarised myself with it.

For those afraid of such cars with CANBUS, it's not such a mamoth issue working on them. Shure you do need experiance and understanding of the CANBUS concept. The hard bit is knowing the protocols or the codes where the interfaces talk to each other (By the way I'm an Electronics engineer - I,m not being smart). For full compatibility, use CANBUS mod's on the car. No CANBUS systems can be used, but the install becomes much more complex and more detail is required of the cars electrics.

I do not intend stripping the car just to trace electric Cct's. I belive fuse function should be identifyed on all cars and well detailed. Vw is attempting to assist in this.

[Umai Naa!!]

I've had no real issues with mystery fuses thus far, in my 18 months or so of working with the product. However, I did come across a GTI Pirelli that had a fuse missing, regarding instrument cluster memory. While it wasn't a fault you'd pick at a glance, it was certainly there.

[Maverick]

The alarm is a mongoose MAP70 and has no direct inpact on the problem, as unit is not wired up. By the way this is a CANBUS alarm, specifically programmed for the Golf. It uses the factory remotes and only adds funmctions to the cars original immobiliser.

How can it not have an impact on the problem. Car worked before you installed it, car didn't work afterwards?

The steering volume only faulted after VW looked at the car (not before). Resetting this cleared it OK. The 2 fuses were replaced by VW, as missing items. No one had been under the bonnett previously (to my knollage) to do anything. So somehow 2 fuses misteriously disappeared?

You said you took each fuse out and checked them!

I take VW at thair word, that they replaced 2 fuses. And they were totally missing, either someone got under the bonnet and removed them (mysteriously after I had worked on, inside the dash area). Or they were never there, which I know one fuse for a fact was not there from new. When I took delivery, I inspected the car and familiarised myself with it.

No offence meant but I really doubt you could remember the locations and types of fuses if you spent 6 months learning them. I've removed the internal fuse box and there is no way you could remember what fuse belongs in a location without the use of photos.

The car worked before you started messing around, the car didn't work afterwards. Put two and two together. As I said if there were two fuses missing (and one of them controls the starting of the car) there is no way this wouldn't have been picked up.

For those afraid of such cars with CANBUS, it's not such a mamoth issue working on them. Shure you do need experiance and understanding of the CANBUS concept. The hard bit is knowing the protocols or the codes where the interfaces talk to each other (By the way I'm an Electronics engineer - I,m not being smart). For full compatibility, use CANBUS mod's on the car. No CANBUS systems can be used, but the install becomes much more complex and more detail is required of the cars electrics.

You wouldn't let a rocket scientist fly a rocket so perhaps the same applies here

I do not intend stripping the car just to trace electric Cct's. I belive fuse function should be identifyed on all cars and well detailed. Vw is attempting to assist in this.

Best of luck with the install, sounds like you need all you can get!

[davidno64]

MAVERIC, to me it seems you'r picking on particular statments, rather than the whole situation in context. I understand where you come from, as in cause and effect.
But trust me working on the interior secton of a car does not cause fuses to disappear under the dash board.
I accept without the fuse the car wouldn't /shouldn't start, but maybe without it, the car was getting feedback for another Cct.

( I had a Mercedes Vito and nothing but injection problems with it. The electrics on this I would not call by anymeans CANBUS, but it certainly was computer controlled. Tail lights are computer controlled, etc. In attempting to fit LED tail-lights this caused feedback. LED being a diode was causing a Cct between BRAKE, GND, TAIL. The result was when braking, this would cut motor revs. In it's self not a problem. Unless you have you're foot on the brake at idle ).

I'm concerned that a simlar issue occoured when there was no fuse. I would lay money that at least one fuse was missing. I suspect this will probly remain a mystery.

You cannot blame mispositioning the fuse as the cause of non start. As the car would not start, even before the fuses were checked. Why I know about one fuse specifically not being presant, when I familiarised myself with the car. I was considering fitting an accessory from this fuse position, as it was blank.

The steering wheel issue was after VW worked on the car. In working on it, they may have caused a glitch in the firmware. A power reset fixed this. But I did find latter the sterio touchscreen stopped working. This is a non genuine VW copy? CANBUS system. Disconnected the battery for a longer period, to allow all Cct's to discharge. This time all OK.
So just the mystery of missing fuses and fuse positions.

When VW source the fuse details for me, I will post the details online.