these are the two adjusters for the headlights; they are very obvious being white
the hand adjusters for left/right are a little difficult to turn, but the ones most used for up/down ideally require a 7mm Allen key (a size not commonly available in Allen Key kits) but a 6mm will fit and no doubt a screwdriver of the right size would work.
Best always to set up on a garage beam setter as these determine whether you get a pass or not!
nothing is simple these days - this annotated drawing shows only the wiring for the headlights!
they are fed from the Systems Interface board (BSI) in the glovebox.
Could be both dip filaments burnt out - that would be the most likely. Each dip filament is fed by an individual fuse see here but it would be very unlikely they would both blow.
Another possibility would be a faulty column switch - but check the bulbs first.
Living in a country area, I am always amazed at how many cars creep about with only one headlight working - only needs the other to fail and they will be plunged into darkness!
The cause is quite often the auto-headlights circuit which bring the headlights on as it gets darker. We've all seen them - headlights blazing on a dull afternoon - without realising that the highly stressed bulbs have a limited burn life and are certain to fail prematurely. Moral - switch off the auto-headlights!
access to the rear of the headlight units looks good after taking off the rubber covers.
BUT the headlight bulbs are well inset; they are held in place by thin springy wire and can require some care and patience to replace.
Press on the wire where shown and slide it sideways - the spring wire is hinged at the bottom so pull it back to release the bulb. Use a torch and mirror to see what you are doing in there!
The springy wire is surprisingly strong and in a confined space, you might find it easier to use a metal sewing thimble underneath a nitrile disposable glove. The gloves are to hold the thimble on so it won't disappear into the innards of the headlight assembly.
I use Osram Night Breaker Plus H4 bulbs which seem to last well; others prefer Philips.
The orange indicator lights are easy to change but you will need a torch and some patience to unclip and pull out the sidelight bulbs.
If your headlights look like this, the UV protection has been washed off after repeated washing and the lens attacked by UV from the sun. I have seen many worse but even these had a poor diffused light output and are potential MOT failures.
First reaction may be to replace the headlight, but there is no need to do so as the milkiness can be polished out
They can be carefully polished out starting with 800 grit wet & dry emery paper - you have to be brave; it will work if you are patient.
You can use an electric drill, but be careful not to overheat the plastic. I did mine by hand; the headlamps are at convenient height when sitting on a chair on a fine day!
Good “how-to” video on this page Auto-glym Headlight Restore - there are many others on the market.
I carefully worked down using ever-finer grades to finish with 7,000 grit wet & dry (with plenty of water and a drop of washing up liquid). Change the water between each grade; you won't want any coarser grit getting back onto the soft plastic.
. . . and then a good polish up - I used Meguiar's PlastX Clear Plastic Cleaner Á Polish which takes out the last of the fogging from the 7,000 grit paper very well.
. . . and finally a double application of anti-UV polish. I use this which seems to work well.
Various kits suggest using an electric drill, but I found that hand rubbing and patience were better controlled. The end results look as good as new.
The workshop CD's suggest extensive dismantling of the front end.
However Yves suggests that “You only need to take 2 parts off as far as he remembers: 4 torx screws under the bonnet, then the thing with the Peugeot logo comes off, and then 2 more torx screws and 4 torx bolts and you should have enough access to take the headlight off.”
I replaced mine with the LED version of these
According to the Drivers' Handbook - these simply slide forward against springy plastic and then pull out at the front: I found it better to use a plastic pry tool like one out of this kit to carefully lever the opposite end out (careful with the paint!) once I knew where the springy end was. As they fit either way, one of my side repeaters was opposite to the other!
Once out, unclip the connector (careful the wire doesn't slip back into the depths or you will need to take the splash guard off!)
I like the look of them, but wait and see what the MOT says - they are orange so should be legal (and all have now passed without comment).
I fitted mine so the light strip moves forward (ie the first to light is closer to the door). Easy to check - lock the car and then press the lock button again so all the lights flash quickly.
I have fitted LED sidelights at the front. They are much brighter and easier to see especially as the light fades. I fitted Osram w5w led warm at the front. Not changed any others though; as they seem perfectly adequate.
the Systems Interface (BSI) is a wonder in itself - I'll leave the reader to work out what does (or should do) what.
One or two reversing lights have failed - if not the bulb then this has been traced to the switch on the gearbox.
I have also fitted warning reversing bulb to give audible warning of reversing. Removed as pedestrians took no notice anyway!
Alternative LED type warning reversing bulb to give audible warning of reversing. Also removed as pedestrians took no notice - back to normal 21 watt bulb!
If headlights come on at same time as Brake Lights. Check the stop/tail light is the correct one. Fitting a single filament bulb can jumper across the two circuits and cause endless confusion. It does happen!
The rear light assemblies are removed via access panels inside the boot. Two special nuts hold the assembly in place: if tight, they can be started with the wheel nut spanner (really!). I have also fitted an aftermarket rear proximity warning alarm to the green car.
Remove both nuts (don't drop them) and the whole of the rear light assembly can be slid out. Unplug the connector (lock is on the side and quite stiff) and give it a light spray of Servisol contact cleaner/lubricant.
Check the gasket - should look like new - make certain it is replaced in the same position or water will get in.
The 6-way connector socket is on the back. Apparently this socket can occasionally give problems due to an overloaded earth pin - mine were fine, but given a spray of Servisol in case.
Note this is becoming more widely reported as the cars age.
Eight years on, a check showed that one rear sidelight dims very slightly when the flashers are on. The earth pin (far right, supplied from yellow/green wire in plug when in the car) showed signs of corrosion. Cleaned up and contact OK again.
As at November 2020 Amazon has the plug available . I am not sure of the wire colours, but should be easy enough to splice in.
The three lamps (other side is the same but with the rear fog light in place of the reversing light) are on a sub-board which simply clips into the back of the light structure.
Replaced the side/brake light 5/21 watt which was beginning to turn black and Servisol contact cleaner on all the contacts which looked as good as new.
Is easy to remove after removing two nuts on the inside of the hatch and pushing it out. However some have had trouble removing them as the plastic has become very brittle after 12+ years exposed to the sun.