lost all lights

redalan1971 · Post by **redalan1971** » 15 Dec 2004, 00:30

i have lost all lights on my 1996 xantia 1.9td.
None of the headlights work or sidelights front or back.
The brake lights work and the headlights flash if the alarm is activated. no dashboard lights work either.
The keypad immobilisor also seems to be dead but the car starts without no code being entered.
Are the problems linked and does anyone have any idea as to the cause all fuses appear to okay.

Robin · Post by **Robin** » 15 Dec 2004, 01:55

Have you had any problems previously?
Do all other electrical circuits work correctly?
I am thinking aloud here so bear with me........
The bypassed immobiliser puzzles me because there has to be a constant supply to the shut off solenoid unless the immobiliser control unit has failed as a result of some other trauma possibly related to the lights failure.
Could this be a failed light switch on the steering column?
A failed lighting relay, loose, damaged possibly?
However I don't think the sidelights and dash lights go through a relay - or do they?
Come on someone help us out here!
Robin

redalan1971 · Post by **redalan1971** » 15 Dec 2004, 04:15

no previous problems with the electrics, all was working fine including the immobilisor until yesterday and now no lights or immobilisor but the car does run as normal. wierd i will have to try and trace the feed to the switch when its light.

AndersDK · Post by **AndersDK** » 15 Dec 2004, 04:37

'96 Xantia does not have relays in the lightings circuit other tha the alarm flasher and any dim-dip relay. I suspect a problem in the feed to the lights switch.
More schematics on : http://citroeny.cz/servis/

redalan1971 · Post by **redalan1971** » 16 Dec 2004, 21:26

i have tested the fuse baord today and fuses 4,18,19 have no power to them is there a common feed for each of these and where should it come from (poss a faulty relay or broken wire) fuse board is hard to get behind to trace the wire.

beezer · Post by **beezer** » 16 Dec 2004, 21:45

Have you checked the fusebox in the engine compartment? The one marked in red controls the lighting switch, immobiliser and rear fog lamp relay.

Just looked in a 1.9td VSX and the box is next to the battery. Black fuse 60 amp.

redalan1971 · Post by **redalan1971** » 18 Dec 2004, 01:46

yes i have checked them and there is power at all of them but the one you highlighted is where i am going to start my tracing as it feeds all the circuits that have no power on the internal fuse box.
you dont know by any chance if it feeds a relay that may have packed up the haynes manual doesn't say what relays are what.

beezer · Post by **beezer** » 18 Dec 2004, 04:01

It doesn't seem to except the rear fog light relay. Here is a run down of the fuses and relays in the engine bay:
F1 ABS relay
F2 Cellular telephone
F3 Engine coolant blower motor
F4 -
F5 Engine coolant blower
F6 Headlamp washer delay relay, fog lamp relay
F7 Engine control module
F8 Suspension control module
F9 Fuel pump relay
F10 Oxygen sensor relay
F11 Headlamp washer control module
F12 Headlamp high beam - left
F13 Headlamp high beam - right
F14 Headlamp low beam - left
F15 Headlamp low beam - right
A Alarm system switch
B Alarm system switch
C Fuse box, alarm system relay
D Lighting switch, rear fog lamp relay, immobiliser
E Engine coolant blower motor relay
F Engine coolant blower motor relay
1 Air conditioning compressor clutch relay - Temperature cut off
2 Air conditioning compressor clutch relay
3 ABS relay
4 Fog lamps relay
5 Cold start timing advance relay
6 Starter motor relay - Automatic
6 Glow plug relay - Post heating

beezer · Post by **beezer** » 18 Dec 2004, 18:41

The fascia fuse/relay layout should be :

F1 Audio unit
F2 Coolant blower control module, instrument panel, diagnostic link, lights on warning, over speed warning, cellular
telephone warning immobiliser, vehicle speed sensor
F3 Headlamp low beam relay, suspension system alarm control module, alarm horn
F4 Side lamp - left, tail lamp - right
F5 Heated rear window, seat heater
F6 ABS, cruise control
F7 Horn, trailer socket
F8 Bridged across to F23
F9 Side lamp - right, tail lamp - left
F10 Electric windows, rear
F11 Sunroof, seat heater
F12 Reversing lamps, air conditioning system, air conditioning compressor clutch relay
F13 Seat adjustment
F14 Engine control module, engine coolant temperature control module
F15 Alarm system relay, interior lamp delay relay, boot lid lamp, diagnostic link, audio unit suppressor
F16 Cigarette lighter
F17 Alarm system control module
F18 Rear fog lamp
F19 Instrument panel illumination
F20 Air conditioning blower motor
F21 Central locking
F22 Sun roof, door mirror adjustment electric windows - rear, central locking system, seat adjustment
F23 Bridged across to F8
F24 Windscreen wiper motor, windscreen wiper delay relay, transmission selector lamps
F25 Audio unit memory, clock, central locking signal control module, seat adjustment relay, alarm system LED
F26 Hazard lamps switch
F27 Electric windows - front
F28 Rear screen washer motor, rear screen wash/wipe switch, rear screen intermittent wiper relay, stop lamps switch,
indicator relay
F29 Heated rear window, door mirror heaters
F30 Interior lamps, glove box lamp, electric windows, instrument panel
1 Seat heater relay
2 Horn relay
3 Electric window circuit relay - front
4 Rear fog lamp relay
5 Sunroof motor relay
6 Electric window circuit relay - rear cut-off
7 Electric window circuit relay - rear
8 Alarm system relay
9 Heated rear window relay
10 Indicator/hazard warning lamps relay
11 Side lamps 'on' warning buzzer
12 Windscreen wiper intermittent relay
13 Telephone warning buzzer
14 Over speed warning buzzer
15 -
16 -
17 -

redalan1971 · Post by **redalan1971** » 19 Dec 2004, 20:34

problem solved.
very odd but the charging output from the alternator appears to have melted where it leaves the alternator i have replaced the section affected and all appears fine, lights work and so does the immobilisor.
Thanks for everyones help.

NiSk · Post by **NiSk** » 19 Dec 2004, 22:35

Best that you check the voltage you're getting across the battery when the alternatpors charging - and also that it still charges when you load the output heavily, since it could have blown one or two rectifier diodes and still give a reasonable output voltage.
//NiSk