2004 Ford Focus ford focus 54 plates

You sure it's the correct key ? Not sure what model it is as they changed to MK 2 later in that year , but would check all fuses that may be related . There is a fuse on the MK 2
67 10 Immobilizer module (WFS), instrument cluster (ignition supply)

Ford Focus (2004 – 2010) – fuse box diagram
Year of production: 2004, 2005, 2006, 2007, 2008, 2009, 2010

Passenger Compartment Fuse Box (2004-2007)
Ford Focus - fuse box diagram - passenger compartment
Ford Focus – fuse box diagram – passenger compartment
No. A Protected components
37 10 Left-hand headlight (high beam)
38 10 Right-hand headlight (high beam)
39 20 Cigar lighter, rear auxiliary power socket
40 20 Sliding roof
41 20 Door module (passenger door)
42 7.5 Outside rear view mirror defoggers
43 10 Electronic modules (battery supply)
44 10 OBD II (board computer diagnostics)
45 10 Daytime running lights
46 10 Instrument cluster, GEM module
47 15 Washer pump, heated washer nozzles
48 20 Low beam headlights, daytime running lights
49 15 Headlight switch
50 20 Windshield wiper
51 15 Fuel pump
52 25 Rear window defroster
53 7.5 Parking lamps, side lamps, tail lamps (left-hand side)
54 7.5 Parking lamps, side lamps, tail lamps (right-hand side)
55 20 Door module (driver door), central locking system
56 20 Keyless entry system
57 10 Alarm horn
58 15 Audio modules (battery supply)
59 25 Luggage compartment auxiliary power socket, trailer tow module
60 15 Right-hand headlight (low beam)
61 15 Left-hand headlight (low beam)
62 20 Power seat (driver side)
63 25 Power windows
64 – Not used
65 10 Airbag module
66 7.5 Headlight adjustment switch, low beam headlights, xenon module
67 10 Immobilizer module (WFS), instrument cluster (ignition supply)
68 7.5 Radio, instrument cluster
69 20 Fog light
70 10 Electronic modules (ignition supply)
71 10 Daytime running lights
72 25 GEM
73 7.5 Number plate lights
74 15 Stop light
75 10 Transmission control module, accelerator pedal
76 7.5 Electric parking brake (EPB)
77 25 Central locking relays
78 15 Rear window wiper
79 15 Folding mirror
80 10 Interior lights, outside rear view mirrors
81 20 Door module (right-hand rear)
82 20 Door module (left-hand rear)
83 10 CD-changer, rear seat entertainment (RSE)
84 10 Back-up light, trailer tow module
85 10 Cooling system
86 20 Seat heater
Relay
K1 Rear window defroster
K4 Fuel pump
K5 Daytime running lights

All checked by electrician and rac guy. But when is me neighbour told me after I show him auto electrician diagonistic msgs he thinks it’s not keys it’s ECU. I don’t understand who to believe.

You checked to see what fault code is flashing ?

After turning on the ignition and the light will flashing rapidly . leave the light flashing for 1 minute

It should the give you a flash code for example 1 flash ( pause ) then 2 flashes this indicates flash code 12

Yes I have read flash code 15

Flash code 15 on the passive anti theft system (PATS) is incorrect key code or un programmed key being used. If you have another key try that . Could try the key programming process in owners handbook if you have one and see if it fixes the problem.

If not , you may need to either get a new key or have the key programmed by a garage / mobile car lock specialist .

I have both original keys I have tried rac guy tried same thing.
Auto electrician diagonised with his computer errror code which are as under

P1000. Check of all the system is not complete since last memory clear
B1601. Pats received incorrect key-code from ignition transponder
B1342 . Pats malfunction
P1000. Check of all the system is not complete since last memory clear
B1601. Pats received incorrect key-code from ignition transponder

Wish I could send the picture. But when I send this report to locksmith he says it’s not key it’s so thing to do with wiring or ecu fuses. Not keys. I got both original keys both are not working.

This is list of fault codes , cant do any more than already suggested

Check DTCs (Diagnostic Trouble Codes) on your vehicle using flash codes
PATS LED INDICATOR
The LED indicator is used for the PATS system and also other Anti-theft systems fitted to
the Ford vehicle range.
When the ignition is switched ON, the PATS LED will illuminate for 3 seconds while it
performs a self-test, after which it extuingishes.
When the PATS system is armed and immobilised the vehicle, the PATS LED will flash
quickly.
If there is a fault on the PATS system, and the engine can start, the PATS LED will
illuminate for 60 seconds continuously, and then flash the PATS fault code 10 times. If
the engine is unable to start and disabled by the PATS system, then the PATS LED will
FLASH for 60 seconds and then flash the PATS fault code 10 times.
PATS LED is mounted either in the front headlining or next to the heater controls/clock.

The PATS system has it’s own self diagnosis test procedure which
flashes codes. The PATS LED will flash quickly for 1 minute, and then
start flashing the fault code as follows:-
Example : code 31
3 Flashes
1 Flash
Three seconds delay
Repeat of code for 10 times
Code Descriptions :-
Code 11 Transceiver not connected
Code 12 Transceiver
Code 13 No key data received
Code 14 Part of the transponder code received
Code 15 Wrong transponder key
Code 21 Less than the minimum keys required programmed
Code 22 Failed diesel pump control unit identification
Code 23 The response code between pump control unit & powertrain
LED = Always ON or OFF
Check the fuse 15 (5 amp)