Hey BricKies,

As I collect bits and pieces to convert my RS bar set up to RT/LT bars, I will ditch the RS rearview and so the indicators as well, I will get some aftermarket flush mounts I guess and rather than cut up the wiring on the discarded units I want to source the plugs to attach to the new indicators. This should make removing the fairing for future work easier too.

I make the wild assumption that they are Bosch bits. Anybody know where to start looking? wreckers? Bosch catalogue? I guess I can replace both male and female, but I like the idea of the option for me or even a future owner to go back to original.

Also, a question for the electronic nerds. Is my assumption correct that the rapid flash given by the BMU is triggered by a resistive value at the end of the indicator wires? If I fit LED indicators, could I fool the BMU by adding a resistor of required value?

Jez

yes you could jes

the magic figure is about 21 watts worth of load for each indicator


so ohms laws tells us that 21 /12 = 1.75 amps per globe

but there maybe a better solution .... do remember ducks post about alternative light = turn indicator controllers    which are far less dependant on current of the lamps  and mods to do this

 if your leds use only a portion of that wattage then load resistors will be reguired to get the flash rate correct with the standard setup

good luck mate

it isn't hard to do

Jez wrote:....
Also, a question for the electronic nerds. Is my assumption correct that the rapid flash given by the BMU is triggered by a resistive value at the end of the indicator wires? If I fit LED indicators, could I fool the BMU by adding a resistor of required value?

Jez

Not the BMU... the flasher relay.
When fitting led blinkers... here's another option
https://www.k100-forum.com/t7153-relay-question

Cheers

The connectors are just normal spade connectors...but you may have to cut the connectors on the wiring loom to attach bullet connectors, as the after market indicators you buy will have bullet connectors on them so that the connectors can fit through the bolt used to hold te indicators on.

Jez wrote:Also, a question for the electronic nerds. Is my assumption correct that the rapid flash given by the BMU is triggered by a resistive value at the end of the indicator wires? If I fit LED indicators, could I fool the BMU by adding a resistor of required value?

If you feel brave, open up the BMU and cut the trace on the board that enables the hyperflash feature. Once done, you have a BMU that can handle LEDs or globes equally. Instructions at this URL:
http://classickbikes.com/ckb.tech/0.ckb.tech.files/ledoemflrelay/ledoemflrelay.htm
(Note: Though Duck severs the IC pin, an easier route is to cut the trace on the underside of the board. It becomes reversable)

robmack wrote:

Jez wrote:Also, a question for the electronic nerds. Is my assumption correct that the rapid flash given by the BMU is triggered by a resistive value at the end of the indicator wires? If I fit LED indicators, could I fool the BMU by adding a resistor of required value?

If you feel brave, open up the BMU and cut the trace on the board that enables the hyperflash feature.  Once done, you have a BMU that can handle LEDs or globes equally. Instructions at this URL:
http://classickbikes.com/ckb.tech/0.ckb.tech.files/ledoemflrelay/ledoemflrelay.htm
(Note: Though Duck severs the IC pin, an easier route is to cut the trace on the underside of the board.  It becomes reversable)

does performing this mod mean the BMU is fooled and performs as normal? I.e the fast flash returns if an indicator is broken?

does performing this mod mean the BMU is fooled and performs as normal? I.e the fast flash returns if an indicator is broken?

No. The BMU has the hyperflash feature disabled by letting pin 7 float (it is normally grounded). With this mod if an indicator lamp blows, the flash rate will not change, as would be the case with an unmodified BMU.

I'd just go with a resistor in line Floyd, the BMU I guess should supply a hyperflash should the indicator circuit be broken or LEDs fail. If this is wrong, I'm sure I'll be corrected soon.


Jez

Just so you don't go modifying the wrong component. Unless I'm mistaken and you're talking about something else the BMU doesn't control the flashers and is not connected to the flasher circuit. The flasher relay does that and its located in the rear left corner of the electrical box.

Just so you don't go modifying the wrong component. Unless I'm mistaken and you're talking about something else  the BMU doesn't control the flashers and is not connected to the flasher circuit. The flasher relay does that and its located in the rear left corner of the electrical box.



Hadn't even crossed my mind Kap'n as I'll go down the added resistor route. I'd like to to keep the "Indicator Malfunction Indicator Function" functioning.

Thank you for your wise words tho.

Jez

Good that it was sorted.........or you could have ended up with a hyperflashing tail light.... .

Jez, if I understand your question correct you want to put on new indicators and
connect these to the allready existing RS connectors? Then you need..........
4 contacts BMW part #61 13 1 365 099.
2 contact housing BMW part #61 13 1 369 747.

Inge K. wrote:Good that it was sorted.........or you could have ended up with a hyperflashing tail light.... .

Jez, if I understand your question correct you want to put on new indicators and
connect these to the allready existing RS connectors? Then you need..........
4 contacts BMW part #61 13 1 365 099.
2 contact housing BMW part #61 13 1 369 747.

Problem is.....

Any aftermarket flush mount LED indicators one purchases will have a different mounting system. They will have a hollow bolt incorporated into the indicator housing that is used to mount the indicators to the fairing. The indicator wires pass through this hollow bolt. Which means that the new indicators wires and connectors must be able to fit through the hole in the fairing as well as the nut that goes onto the mount bolt to hold it on. Most connectors blocks will make this impossible.

Spade connectors (that are on the stock wiring loom) can be attached to the new indicators, but you have to make sure they will still fit through the nut. The new indicators will come with bullet type connectors for this very reason. 

I cut off the bullet connectors from the indicators and soldered on spades. They only JUST fit through the nut, one at a time, and I have to be careful not to damage the insulation. It would be better to have cut the spades off the loom and soldered on bullets to suit.

my $0.02

'Any aftermarket flush mount LED indicators one purchases will have a different mounting system. They will have a hollow bolt incorporated into the indicator housing that is used to mount the indicators to the fairing."

Yeah but nah, something like THIS.

Thanks Inge, for the part numbers (had no idea it was a multi part affair!)

Regards, and thanks for the input all.

Jez