Fuse box layout / year?

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My Name: Richc69

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Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 164000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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I have owned my Citroen C3 1.6Hdi since 2010. It was first registered Nov 2005. On a '55'plate. I've recently had an issue with the starter motor blowing fuse F8 which in mine is a 20amp. On looking at the images. My C3 has the 2007 -2010 layout inside cabin and engine bay fusebox bearing in mind my vehicle is a Nov 2005 model? I appreciate some parts will alter as the models get a facelift etc but seems almost 18 months before 2007 model came out. Also I have a 20 amp fuse but the 2007 model onwards has a 25amp. My car has been fine with 20amp fuse until recently blowing it on an odd occasion which I guess will be because of starter/solenoid issues. My other question is seeing as I have a 2007 fusebox should I have a 25amp fuse also? Very strange? Did I read correctly somewhere there had been an 'info rapid' to dealers regarding uprating a 20amp fuse to a 25amp fuse in diesel Citroen C4 similar model year? Any thought or info would be very grateful.
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My Name: C3CAR

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Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
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Hi Richc69
Richc69 wrote:Nov 2005. On a '55'plate. I've recently had an issue with the starter motor blowing fuse F8 which in mine is a 20amp.
These are the 2 possible layout and fuse box ratings for the C3 and the C3 facelift.

2002-2006 BSM (engine bay fuse box)
citroen-c3-tips/c3-2002-to-2006-engine- ... -t157.html

2006-2010 BSM (engine bay fuse box)
citroen-c3-tips/2007-to-2010-facelift-e ... -t150.html

The 2 fuse box layouts are quite different and the 2006-2010 model shows a 25A for the starter.

I would say yours is one of the first 2006 facelift models.

The Diesel and Petrol have the same layout of fuse box, same fuse boxes but some fuses do different function depending on the fuel.
My Name: Richc69

Contributor
Posts: 6
Joined: Mon Jun 27, 2016 10:55 am
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 164000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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Much appreciation for your answer. My thoughts were if I have a later(facelifted) C3 with the later design fuse box. Would it follow suit I perhaps should have a 25amp fuse not a 20 amp?
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My Name: C3CAR

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Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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Richc69 wrote:Much appreciation for your answer. My thoughts were if I have a later(facelifted) C3 with the later design fuse box. Would it follow suit I perhaps should have a 25amp fuse not a 20 amp?
Yes, that is what the diagram shoes. 25A for the starter in a facelift 2006 C3.
My Name: Richc69

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Posts: 6
Joined: Mon Jun 27, 2016 10:55 am
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 164000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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Totally appreciate what diagram shows. It just makes me wonder as all time I have owned my car which is almost 6yrs I have had no issues re blowing a 20amp fuse. But it does make me wonder if it should acruelly have a 25 amp but was wrongly put in a 20 amp before I purchased car? Is there any foolproof way to check?
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My Name: C3CAR

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Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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I am not aware of any fool proof method to check. As you mentioned earlier that fuse ratings are changed on later models to account for faults that appear later in the cars life it can also be to cover different specification parts fitted to later models.

If it were mine, I would just go for the 25 and if it blows I would look at the starter solenoid that you also mentioned.
My Name: Richc69

Contributor
Posts: 6
Joined: Mon Jun 27, 2016 10:55 am
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 164000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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Many thanks for that. The next time it blows I may try a 25amp. I always worry about putting over rated fuses in incase it damages anything else on citcuit.It's really intermittent when it blows. Didnt blow for a week then did a 25 mile journey. Turned off then wouldn't start. Changed fuse to return the 25 miles. Then fuse blew again. I thought worse when engine hot? Then did a 120 mile return journey. Arrived home and turned off then tried and started first time and not had problem since with 20amp fuse. Very strange?
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Model: C3 2002-2005, Original shape model
Year: 2004 (04)
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Fuses are quite complex things, at least in the way they work.

When you fit a fuse rated at 20 amps it doesn't mean to say that it will blow instantly when the current exceeds 20 amps. It may carry 22 amps quite happily for weeks. The time it takes to blow depends greatly on the degree of overload. You also have to consider the circuit that the fuse is protecting, is the current constant?

Car fuses have quite a high fault tolerance, far greater than those used to protect sensitive electronic circuits which are usually quick blow or in some cases very quick blow. On the other end of the scale there are so called anti-surge fuses which will tolerate a current several times their rated value but only for a very short time, these are typically used on circuits with motors, motors have a high starting current compared to the running current, it would however be unwise to fit a fuse rated at the starting current as it would provide little protection at the running current.

Car fuses are usually a medium tolerance, somewhere between anti-surge and quick blow. I would think that the issue that was found in this instance is that a 20 amp fuse was being pushed just a little too hard, were as 25 amp is operating well in it's working tolerance.

Examining a blown fuse can often shed light on the problem. If the fuse element, the thinner metal part between the thicker terminals only has a small fracture it likely failed due to fatigue, long-term small over-current. If the element is missing ie vapourised, the failure was major, something like a short circuit. Other signs can be oxidised or discoloured elements which are also a sign of long term but small over-current causing heating of the element.
If at first you don't succeed, destroy all the evidence and pretend you never tried :lol:
My Name: Richc69

Contributor
Posts: 6
Joined: Mon Jun 27, 2016 10:55 am
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 164000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

Hiya. Thanks so much for a very in depth answer. The times my fuses have blown they do look quite obliterated. Dark inside and kind of like an explosion in a confined space. I read somewhere they were designed like that so there was no way the circuit could be bridged again after it had blown? Not too sure on that. It's only what I have read. But I guess if it blows again I will try a 25amp. Because if it's correct with your description how the fuse blows then I guess it would blow it in the same way i.e as in a short circuit. I then guess it would be time for new starter/solenoid? Many thanks again.
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