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sean
sean, UK Ford Master Technician
Category: UK Ford
Satisfied Customers: 2895
Experience:  Ford Master Tech since 2001 & MOT tester mechanic since 1984.
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2005 Ford focus: Electric windows/mirrors..heated..fuses..fitted

Resolved Question:

2005 Ford Focus 2ltr petrol.

The following does not work. Electric windows/mirrors, reverse light, any foglights, washers, the heated front screen is perminantly on.
All of the fuses are fine. Ford fitted a new body control modual and it made no difference. They told me they could not find anything by plugging the car in.
I have changed the main fuse box under the glove box as it had a small amount of corrosion inside but had made no difference except now the remote central locking doesn't work.

Any ideas please? will be changing alll the relays monday
Submitted: 4 years ago.
Category: UK Ford
Expert:  sean replied 4 years ago.

Hi

all the items you describe are controlled by the fuse box you have changed.The fuse box is also a control module when replaced it needs configuring to the car.What did Ford class as the body control module? as this fuse box controls alarm and locking functions.Where the corrosion was in the fuse box are the connectors that go there free of corrosion?

You need to start by making sure the fuse box is correctly programmed to the car,the remote locking function needs to be activated in the fuse box(module)as part of this.

Customer: replied 4 years ago.
Hi there thanks for your reply i spoke to ford today and the 'body control modual' that they replaced was actually the fuse box that i have said about. They fitted and programmed and made no difference so am now back to my original fusebox and central locking is back to working how it was.

So the box its self is the origonal and therefore all programmed.

The area that had corossion was where the small black plug locates (all other plugs on thee are big blocks except this one. It looks as if there is a small amount of corrosion in there but i have tried the car with this plug off and the heated screen was still on.

What would be the next step? thanks
Expert:  sean replied 4 years ago.

Hi

start with one fault the heated front screen first. If the heated screen comes on by itself this is a protection feature for the charging system overcharging.

Check the charge rate of the alternator if it goes above around 15volts this would be seen as excessive so the fuse box (GEM) turns on the heated screen to try to use the excess.

Can you clarify what isn't working now?

Customer: replied 4 years ago.
Right i currently have removed the relay to the screen as i was worried about it being damaged if it was on the whole time i was driving.

To clarify - No electric windows/mirrors, reverse light, fog lights (front and rear), washers (front and rear)

I have also sprayed all the plugs on the GEM today with contact spray and has made no difference

Will try and get voltage checked tomorrow, but would this also affect/cause the things that aren't working?
Expert:  sean replied 4 years ago.

Hi

It is possible an overcharge condition could cause the GEM to shut down. I still think this problem is related to the GEM as everything that isn't working is controlled by the GEM.

I would just check that the screen is actually working and it's not just the light on the switch that is on.

Regards

Sean.

Customer: replied 4 years ago.

Hi

I have exchanged all of the relays on both fuse boxes with another focus just to make sure and no difference.

 

Have had the alternator checked and it was 13.90

 

Yes heated screen is definatly on.

 

Ford did fit a new GEM (fusebox) and programmed it and made no difference so they put the old one back in.

I have tried my fusebox (GEM) in another focus today and all the functions worked fine.

 

We have used a circuit tester on all the fuses on the GEM and did not get a light from the following fuses - 47(washer pump/heated washer jets), 63 (electric windows), 69 (foglamps) and 84(reversing lamp/electric mirrors)

So it appears that there is no power getting to these fuses

Expert:  sean replied 4 years ago.

Hi

fuses 47,63,69 and 84 are all powered by the ignition relay in the fuse box next to the battery, this is switched by the GEM. The power from this relay is from fuse 25 (10amp)in the battery fuse box,when switched to earth the relay powers the fuses you have given from fuse 12 (40amp) in the battery fuse box. Check these two fuses and the relay operation, check you have 12 volts at two terminals of the relay pins 1 & 3 with ignition on. The relay is the 4th down on the right in the battery fuse box,there are three small relays above it and one small relay below it the ignition relay is bigger than these. Power from fuse 25 also powers the heated screen relay this is switched by the GEM.

If the fuses in the battery fuse box are ok you need to check for 12volts at pin 21 of connector 96 (green and red wire) of the GEM and 12 volts at pin 13 (black and blue wire) of connector 95 at the GEM.

sean, UK Ford Master Technician
Category: UK Ford
Satisfied Customers: 2895
Experience: Ford Master Tech since 2001 & MOT tester mechanic since 1984.
sean and other UK Ford Specialists are ready to help you
Customer: replied 4 years ago.
Excellent mate. Went to check fuse 25 and it wasn't there, stuck one in and job done. Thanks so much for your help you really know what your on about. Not sure how ford were unable to notice that as i would have thought it would have been one of the first things they would have checked seeing as you say it controls all of the relays for all of the stuff that wasn't working. Will be getting in touch with them to try and reclaim the money they charged me. Thanks again for the help it has been much appreciated. Keep up the good work cheers Corey

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