Roger wrote: "The nose of the new lamp is slightly larger than the hole
in the rim into which it should fit. I opened up the hole using a
carbide burr which only took a few minutes to remove about 1mm all
round. I then used the same burr to make the slot in the bulb flange.
(More difficult than expected as the material is a quite hard steel as
opposed to brass on the old one)
hole cut for side light to shine through
Having got the
reflector assembly to fit into the rim and put a slot for the side
lights in both halogen bulbs I found that when trying to fit the 3 pin
socket onto the bulb prongs the side light bulb fouled. The slot and the
bulb were not on the same centres. I cut away the the flange as per
attached photo (below)
and the assembly goes together perfectly. A word of warning, the first
one I did using a carbide burr ended up with a broken filament. I did a
"soft" mod by using a pair of side cutters and cutting//twisting the
material away. It sounds complicated but took just a couple of minutes
each. The improvement in the lights is huge and even the side lights are
flange cut away to allow socket assembly to
Roger for doing such a thorough job and providing the photos. ( I always
promised myself that I would cut some holes for the side lights one day
but that day has yet to come.)
DISCUSSION ON THE TOPIC
(M201 no. 16690) offered the following:
"I have since the beginning
converted the headlights to Bosch lights with H4 halogen bulbs. But what
I have is yellow H4 bulbs. So you can have the effect of yellow lights
and have a reasonable light output. Of course a white halogen bulb still
provides much better lighting. I got these bulbs many many years ago in
France, not sure if they are still available."
Thanks for that Horst but I
suspect that the time when it was possible to buy these in France has
now long since passed. White headlights became the norm in France as a
result of EU law passed in 1995 and these days only very old vehicles
tend to be seen in France with their original yellow lights.
Yellow light from white
halogen bulbs is still possible!
Not one to be deterred, Scott
Potter (m201 no.13542) in the US. has achieved the original yellow look.
"I searched the web for bulbs
and got in touch with a fellow named Ken from Candlepower Inc. here in
the US. He set me up with two Narva #48892 75/70w P43t base 24v bulbs.
He also had these yellow balloons, #H4-HB2-9003, that fit over the
bulbs, and into the Valeos just fine. I had to cut three slots for the
tabs on the Valeos in the buckets, then the slots in the bulbs for the
running lights, but that was no problem."
Great work Scott.
The Candlepower website can be found at
The issue of yellow headlamps
got me thinking about the legality of having them on M201s here in the
UK so I did a bit of research.
The Road Vehicles Lighting Regulations
SCHEDULE 2 (Regulations 18 and 20)
REQUIREMENTS RELATING TO OBLIGATORY FRONT POSITION LAMPS AND
TO OPTIONAL FRONT POSITION LAMPS TO THE EXTENT SPECIFIED IN
7. Colour: White or, if incorporated in a headlamp which is
capable of emitting only a yellow light, yellow.
In the case of my Delahaye VLR, which still
has its yellow headlamps, it isn't possible to get white bulbs of
any description and the yellow ones which are a 24 volt Marchal
three pin bayonet lamp are also now like hen's teeth to find even in
In the case of Hotchkiss M201s, technically it
is impossible to get direct replacement bulbs. It is possible to get
24 volt white bulbs in either tungsten or halogen but not with the
slot for the sidelight. So it would appear that in terms of UK law
it is perfectly legal to retain the original yellow bulbs.
So there it is, unless you know different (as