Busch & Muller wiring diagrams

Anybody know where to find B&M headlight wiring diagrams or schematics?
I've got an old Lumotec Halogen that burned out my last spare bulb. I'd
like to keep using the standlight function and wire in an LED light bar
to replace the bulb. There are a few unused external terminals and it would
be nice to know what they do; the mechanical design makes it rather awkward
to probe. Reading any available literature seem prudent before taking
things apart.

The unit is a Lumotec Oval Senso Plus, about 12 years old. I've looked on
B&M's website, and at least the English-language portion seems to contain
absolutely no installation or wiring instructions. That seems rather odd.
I wouldn't expect them to publish schematics (it would be helpful), but
it's most un-Teutonic to not offer complete instructions for setup.

Thanks for reading, and any pointers.

bob prohaska

On 8/1/2019 8:09 PM, bob prohaska wrote:
Anybody know where to find B&M headlight wiring diagrams or schematics?
I've got an old Lumotec Halogen that burned out my last spare bulb. I'd
like to keep using the standlight function and wire in an LED light bar
to replace the bulb. There are a few unused external terminals and it would
be nice to know what they do; the mechanical design makes it rather awkward
to probe. Reading any available literature seem prudent before taking
things apart.

The unit is a Lumotec Oval Senso Plus, about 12 years old. I've looked on
B&M's website, and at least the English-language portion seems to contain
absolutely no installation or wiring instructions. That seems rather odd.
I wouldn't expect them to publish schematics (it would be helpful), but
it's most un-Teutonic to not offer complete instructions for setup.

Thanks for reading, and any pointers.

bob prohaska







I spent almost an hour on a similar problem a month ago.
Try Peter White's site:
https://www.peterwhitecycles.com/

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

AMuzi wrote:
On 8/1/2019 8:09 PM, bob prohaska wrote:
Anybody know where to find B&M headlight wiring diagrams or schematics?

I spent almost an hour on a similar problem a month ago.
Try Peter White's site:
https://www.peterwhitecycles.com/


Can you give me a hint where to look? I've poked around on Peter's site
enough to know that he offers (or at least did in the past) bulbs for
around $5. If there are wiring diagrams I'm apparently oblivious.

Thanks for posting!

bob prohaska

On 8/1/2019 10:20 PM, bob prohaska wrote:
AMuzi wrote:
On 8/1/2019 8:09 PM, bob prohaska wrote:
Anybody know where to find B&M headlight wiring diagrams or schematics?

I spent almost an hour on a similar problem a month ago.
Try Peter White's site:
https://www.peterwhitecycles.com/


Can you give me a hint where to look? I've poked around on Peter's site
enough to know that he offers (or at least did in the past) bulbs for
around $5. If there are wiring diagrams I'm apparently oblivious.

Another possibility might be to poke around this site:
http://www.reflectalite.com/LEDpage.html

They offer LED substitutes for halogen bulbs. I bought one for a friend
for use in his old generator headlight, and he reports that he likes it.

But IIRC, the website and ordering process are pretty archaic and confusing.


--
- Frank Krygowski

On Friday, August 2, 2019 at 2:09:33 AM UTC+1, bob prohaska wrote:
Anybody know where to find B&M headlight wiring diagrams or schematics?
I've got an old Lumotec Halogen that burned out my last spare bulb. I'd
like to keep using the standlight function and wire in an LED light bar
to replace the bulb. There are a few unused external terminals and it would
be nice to know what they do; the mechanical design makes it rather awkward
to probe. Reading any available literature seem prudent before taking
things apart.

The unit is a Lumotec Oval Senso Plus, about 12 years old. I've looked on
B&M's website, and at least the English-language portion seems to contain
absolutely no installation or wiring instructions. That seems rather odd.
I wouldn't expect them to publish schematics (it would be helpful), but
it's most un-Teutonic to not offer complete instructions for setup.

Thanks for reading, and any pointers.

bob prohaska

Assembly instructions:
http://en.bumm.de/service/download/a...tructions.html
These are everything they appear ever to have published, and they're just external wiring connections, basically instructions not to cross over the wires.

Andre Jute
Proprietary information or paranoia?

On 8/1/2019 9:20 PM, bob prohaska wrote:
AMuzi wrote:
On 8/1/2019 8:09 PM, bob prohaska wrote:
Anybody know where to find B&M headlight wiring diagrams or schematics?

I spent almost an hour on a similar problem a month ago.
Try Peter White's site:
https://www.peterwhitecycles.com/


Can you give me a hint where to look? I've poked around on Peter's site
enough to know that he offers (or at least did in the past) bulbs for
around $5. If there are wiring diagrams I'm apparently oblivious.

Thanks for posting!

bob prohaska





I didn't see diagrams either but reading the lamp
descriptions led me to understand tail light wiring and
stand light features better from which, with a meter, I
unpretzled the customer's wiring problem.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

On 8/1/2019 10:20 PM, bob prohaska wrote:
AMuzi wrote:
On 8/1/2019 8:09 PM, bob prohaska wrote:
Anybody know where to find B&M headlight wiring diagrams or schematics?

I spent almost an hour on a similar problem a month ago.
Try Peter White's site:
https://www.peterwhitecycles.com/


Can you give me a hint where to look? I've poked around on Peter's site
enough to know that he offers (or at least did in the past) bulbs for
around $5. If there are wiring diagrams I'm apparently oblivious.

This won't help you, but: I had an off-brand LED dynamo headlamp in
which the LED itself failed. Since I had some high output LEDs lying
around, I opened the headlamp and with some difficulty soldered in a new
LED.

The circuitry on that one was pretty simple. There was a full wave
rectifier, a voltage regulator and a couple miscellaneous capacitors and
resistors.


--
- Frank Krygowski

Andre Jute wrote:

Assembly instructions:
http://en.bumm.de/service/download/a...tructions.html
These are everything they appear ever to have published, and they're just external wiring connections, basically instructions not to cross over the wires.


That's the sort of document I hoped to find, but the level of detail
and my (non-)grasp of German conspire to defeat comprehension. Oh, wait!

In the figure at

http://en.bumm.de/fileadmin/user_upl...gen/171y-d.pdf

one sees items 1 and 2, with lightning and ground symbols. They
seem to correspond to micro-spade connectors that go to the D-
Toplicht-plus taillight. There's a seemingly matching pair of
micro-spade connectors on the right side of the fixture. That
right-hand pair is unused and might be what I'm looking for.

Thank you!

bob prohaska

On Friday, August 2, 2019 at 7:32:14 PM UTC+1, bob prohaska wrote:
Andre Jute wrote:

Assembly instructions:
http://en.bumm.de/service/download/a...tructions.html
These are everything they appear ever to have published, and they're just external wiring connections, basically instructions not to cross over the wires.


That's the sort of document I hoped to find, but the level of detail
and my (non-)grasp of German conspire to defeat comprehension. Oh, wait!

In the figure at

http://en.bumm.de/fileadmin/user_upl...gen/171y-d.pdf

one sees items 1 and 2, with lightning and ground symbols. They
seem to correspond to micro-spade connectors that go to the D-
Toplicht-plus taillight. There's a seemingly matching pair of
micro-spade connectors on the right side of the fixture. That
right-hand pair is unused and might be what I'm looking for.

Thank you!

bob prohaska

It's a bit more complicated than that, Bob. BUMM makes basically two kinds of headlamps, all under the assumption that there is 3W of power available, that is 6V at 15kph, about 10mph, at 500mA. So BUMM makes
--- headlamps intended to consume all of that 3W, to be used with battery taillights,
and
-- headlamps intended to consume 2.4W, to pass through 0.6W for the consumption of the rear lamp.

So, if a lamp from BUMM has a second set of connectors, they're for the rear lamp, and the front lamp will be a bit weaker than the type which dissipates the full, glorious 3W.

Now, you and I would build such a system by stacking up different numbers of LEDs in the front and rear lamps to draw 0.5A* at different voltages but there is no guarantee that BUMM did the simple thing.

However, I suspect that the additional circuitry, if any, inside the BUMM lamps consist only of a rectifier and a voltage regulator, with the regulated total voltage available disposed between the lamps by the choice of LEDs.

I were you, I'd argue that the lamp is old and has earned its cost, but keep my meter handy to check that I'm not cross-wiring it, which could be fatal to the glowing part of the lamps.

*I don't mean to be offensive but not everyone knows basic electrics, so it is worth stating: the current in a DC circuit is the same at all points, and controls the variation in voltage supplied to the components through the resistances in each sub-circuit; LEDs can be used as their own total resistance (but are often accompanied by a voltage stabilising protective component).

Andre Jute
PS I read German fluently but everyone I need in Germany speaks good English; the really useful world languages are English, Spanish and, coming up, Chinese

bob prohaska wrote:
Andre Jute wrote:

Assembly instructions:
http://en.bumm.de/service/download/a...tructions.html

That's the sort of document I hoped to find, but the level of detail
and my (non-)grasp of German conspire to defeat comprehension. Oh, wait:

Replace an "e" for the lone "d" in a filename.

IFTFY