K11 Owners Group

tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161

Hi there,

I replaced the green traditional bulbs in my Speedo unit with 5 white LED’s.
all went well and all light seem to work.

I had no time to do a test run, not until this morning. I noticed the triangle light (ABS fault light) gives of a red glow (comparable to the battery charging light in some BMW-k bikes).

Any idea what this could be?

I was thinking of the following possibilities:
A LED is mounted wrong and power is going somewhere it should not go?
Light is leaking and getting in the ABS warning light compartment (it is the one in the middle of the speedo, not the bottom left one).
I screwed the unit (I did plug and unplug the unit when the power (ignition on) was on.

I am very interested in any thought on this.

I will open the unit again tonight, but any pointers are very welcome.

Theo

Scott_Anderson

I would bet on bleedthru of the brighter white light into the surrounding area.

Drake may have a better answer as he's the LED mastermind here.
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161

Here drake... here drake....

I will test the leak through by removing the middle light tonight.

Jim · Posted: Fri Dec 04, 2009 9:25 am Post subject:

I don't think it's light bleeding through. I think it's in the circuitry - mine does it as well - it's very faint.
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161

Flying Duck · Posted: Fri Dec 04, 2009 11:00 am Post subject:

I'm with Jim. The compartments for the three center indicator lights are pretty well sealed. I'd guess rogue electrons.

Adding a small resistor (not sure how many ohms) in parallel might cure it.
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tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161

ken · Posted: Sun Dec 06, 2009 10:30 pm Post subject: LED's

OK My instrument cluster has half of the lights out of it, and I am getting ready to take the bike apart this winter. (My project is set to finish up middle of next weekish.) Then I am going to take a trip, come back, and tear the thing apart.

I have seen two posts on here about LED's.

Are these kits, or are people just finding LED's that fit?
Not that LED's are the main purpose, the main bracket for the fairing is broken and will need welded....and well the clutch.....just a big teardown I believe.

Thanks
Ken
_________________
Ken in Denver

Scott_Anderson · Posted: Sun Dec 06, 2009 11:32 pm Post subject:

Ken, Drake has kits available here for your inst cluster. You just need to decide how much of the kit you want, the basic which is the backlighting or the complete, which is as it implies, complete replacement for all the lamps.
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161

Well I replaced the "disobedient light bulb” with an LED last night...
That made the problem much worse.. the light is not going off at all anymore!
So I switched it back to a glow bulb. (I now have 7 LED’s mounted, 5 backlighting, high beam and neutral light are LED’s) left right low fuel and triangular ABS warning light are glowbulps.
The total amount of light is 11 or 12… ?

But there might be a change that a full LED conversion leaves you with a burning warning light.

Scott_Anderson · Posted: Mon Dec 07, 2009 8:02 am Post subject:

Just a thought here, Tmoons, you say that it's your center triangle warning lamp that is glowing.
Isn't that lamp for the bulb monitor(tail lamp) relay circuit?
What would happen to the indicator lamp if you disconnected(unplugged) the relay from the relay box.(you know as an experiment)
Could it be possible that the monitor relay could have a fault in it?

I'm not sure what year you bike is for the total funtion of that lamp. My abs lamps are not related to the center warning lamp.
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161

I have ABS-1. I have 2 lights....
one dedicated to ABS (left bottom section underneath the speedo)
one combined for ABS and lights.
what happens on start up is:
left bottom one blinks.
middle one is on.

Once both brake levers are moved the middle one blinks in unison with the bottom one.

Once a yard or so if "driven" the ABS sensors tell the unit they work and the blinking stops as well.

If you would choose not to touch the brakes and roll away, the blinking stops but the middle light stays lid.

It also has a function in the readout and reset procedure if I am not mistaken.(not relevant)
I could do you check, where do I find that “is the light not broken box”?

Jim · Posted: Mon Dec 07, 2009 10:43 am Post subject:

Tmoons - the triangular light in the middle has to do with the brake light - try changing the bulb. Sometimes the bulb will work - you will see the brake light, but the bulb monitor unit has a problem with it. I use only BMW bulbs - they work better than replacement bulbs.
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161

Jim · Posted: Mon Dec 07, 2009 11:10 am Post subject:

What I was trying to say is: the brake light can work just fine - but the bulb monitor can think there is a problem with the brake light bulb, and will keep the warning lamp on the instrument pod lighted. Changing the faulty (but working) brake light bulb has resolved the situation for me (and others) in the past.
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161

max · Posted: Sun Dec 20, 2009 6:44 am Post subject:

It's the sensor/monitor unit - just replaced the bulb driver transistor in mine (never worked in 4 years, the transistor body had a hole blown in it, guess someone shorted it at some time!) and the curcuit uses a tantalum electrolytic capacitor to bias the transistor OFF when both the switches have "fired"...

I've specifically setup mine so I get a 1/2 "glow" from a generic T10 LED drop-in whenever the brakes are applied and part of this was dropping this cap out; I'll try to write up some notes, but in the meanwhile you might want to find & disconnect the bulb-driving line down at the monitor unit?

Cheers

Max

tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161

i would be very interested in some more detailed notes!

is there a particular reason to disconnect the monitor??

thanks!

Flying Duck · Posted: Sun Dec 20, 2009 5:49 pm Post subject:

tmoons · Flying Brick Rider Joined: 09 Oct 2008 Posts: 161