Rear screen demister.

Questions not related to the fuel type, like Manual Gearbox, Body Work, Lights, Interior trim and Seats, Steering, Brakes, Beeping, Wheels and Tyres to be asked in this topic only.

Audio has its own section - see further down the page.

Please provide as much information as you think may be relevant like recent work on the car and you can attach photographs directly to your topic using the form below the text box.
Forum rules
One question per topic.
No Engine questions
Think: Manual Gearbox, Seats, Bodywork, Lighting, Interior, A/C, Heater, Wheels, Steering, Brakes, Tyres and Suspension
My Name: ken N

Contributor
Posts: 12
Joined: Wed Dec 14, 2016 1:53 am
Model: C3 2002-2005, Original shape model
Year: 2004 (54)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 67000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

Good day all. Recently purchased a 2005 C3 1.4hdi 16V. Load of problems to work through but getting there. It's an Exclusive model so has electric mirrors which of course don't work, triad new mirrors known to be good but still don't work. Tried another known good swtich from a donor vehicle but still don't work. So I go to the in-car fuse box, fuse 10 40a which covers the mirrors and heated rear screen which doesn't work. The fuse is ok but fitted a new one anyway. The red light on the rear screen switch lights up when pressed, so where do I go next? Any thoughts or idea's would be most welcome. Thanks in advance.
Top
My Name: routemaster1

C3 Master
Posts: 216
Joined: Fri Mar 08, 2019 4:32 pm
Model: C3 2017-on. The new C3
Year: 2019 (19)
Engine Size: 1.2
Fuel Type: Petrol
Mileage: 300
Trim Level: Flair
Gearbox: Manual 6 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: EB2DT-EB2ADT PureTech 3-Cylinder (110 PS)
Been thanked: 63 times

Post

ken N wrote: ↑Tue Jan 28, 2020 11:59 am Good day all. Recently purchased a 2005 C3 1.4hdi 16V. Load of problems to work through but getting there. It's an Exclusive model so has electric mirrors which of course don't work, triad new mirrors known to be good but still don't work. Tried another known good swtich from a donor vehicle but still don't work. So I go to the in-car fuse box, fuse 10 40a which covers the mirrors and heated rear screen which doesn't work. The fuse is ok but fitted a new one anyway. The red light on the rear screen switch lights up when pressed, so where do I go next? Any thoughts or idea's would be most welcome. Thanks in advance.
It could be that there is power to the demister but no earth return. You could check with a voltmeter, but I wouldn'y know where to probe.
Top
My Name: ken N

Contributor
Posts: 12
Joined: Wed Dec 14, 2016 1:53 am
Model: C3 2002-2005, Original shape model
Year: 2004 (54)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 67000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

Thanks for the reply. I haven't checked the voltage yet, reason being it runs off the same fuse as the electric mirrors and as they don't work either I'm thinking the problem lies further back. I can live without the mirrors working but the rear screen is a bit of an issue especially this time of year
Top
User avatar
My Name: C3CAR

Guru
Posts: 2741
Joined: Wed May 04, 2011 10:01 am
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)
Has thanked: 198 times
Been thanked: 106 times

Post

Check for a voltage to earth at the fuse you mentioned, F10 40A on the BSI.
Top
User avatar
My Name: Ozvtr

Moderator
Posts: 1196
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 59 times
Been thanked: 351 times

Post

Hi
Can you tell us if your car is a Mk1 or Mk2? 2005 was the change over point.

If you r car is a Mk1 the mirrors get power from fuse F22 in the BSI. If it's a Mk2, sorry, I don't have access to circuit diagrams.

https://www.c3manuel.com/retroviseurs_a_ ... e-124.html
Top
My Name: ken N

Contributor
Posts: 12
Joined: Wed Dec 14, 2016 1:53 am
Model: C3 2002-2005, Original shape model
Year: 2004 (54)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 67000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

It's a Mk1, where is the BSI locoated please?
Top
User avatar
My Name: Ozvtr

Moderator
Posts: 1196
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 59 times
Been thanked: 351 times

Post

It's the "fuse box" inside the glove box.

You said you had "a load of problems" with your car. Any other electrical problems, or things that don't work? They might be related to each other(?). Do you have any sort of test equipment? This will tell us what facilities you have to tackle the problem (if any).
Top
My Name: ken N

Contributor
Posts: 12
Joined: Wed Dec 14, 2016 1:53 am
Model: C3 2002-2005, Original shape model
Year: 2004 (54)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 67000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

Thanks for replying. The other problems with the car were engiine related which are now sorted. I bought an obd reader and a vacuum gauge to test the vac system which proved very worthwhile, I also have a digital multimeter of good quality. I'll check this other fuse hopefully this afternoon :-)
Top
User avatar
My Name: Ozvtr

Moderator
Posts: 1196
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 59 times
Been thanked: 351 times

Post

The circuit diagram is pretty simple.
There's not too many potential points of failure.
The numbers with a 'V' after them (on the ECU's), EG. 2V, 16V refer to the number of pins (used or not) in that plug. The two letters refer to the colour of that plug, in French, EG. NR = noir =black, VE = vert = green and so on.
So F22 goes out of the BSI to the switch via pin 1 of the 16V GR plug. That means its pin 1 of the 16 pin grey plug. The wires are colour coded but the alpha-numeric characters you see on the wiring diagram are also printed on the wires in the car. They designate the system and wire number.
Top
My Name: ken N

Contributor
Posts: 12
Joined: Wed Dec 14, 2016 1:53 am
Model: C3 2002-2005, Original shape model
Year: 2004 (54)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 67000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

Thanks for your help guys, Fuse22 was the culprit, replaced and now everything works as it should :)
Top
  • Similar Topics
    Replies
    Views
    Last post

Return to “Questions about a Citroen C3 not related to the fuel type”