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post #1 of 10 (permalink) Old Sep 21st, 2014, 1:13 pm Thread Starter
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Location: St. Augustine, FL, USA
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No brake lights

Morning:
Just replaced my motolights with new lamps, started the bike, no worked-dah. NO tail or brake lights either. (They all worked when she was parked about a week ago.
I tied the motolight switch power to the tail light +12v. There is no voltage at the lights. Is there a fuse? I cannot find a list of what fuses go where anywhere. However all fuses in the two fuse boxes behind the tank and above the tool tray are all good. The fuse to the motolights (tied directly to the battery is also good. Any help would be greatly appreciated.
Thanks...

01K12RS

…bob...

01 - K12RS
72 - R75/5
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post #2 of 10 (permalink) Old Sep 21st, 2014, 1:51 pm Thread Starter
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Ok, Brake lights work. Headlights work, turn signals work, emerge flashers work.
Tail, hyper lights, license plate light, motolights not so much.

No voltage at the tail connector up on the right side sub frame.

???!!!

…bob...

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post #3 of 10 (permalink) Old Sep 21st, 2014, 2:16 pm Thread Starter
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I think I found a proper fuse chart. Appears that fuse is good and power at the fuse.
NO power at the aforementioned connector on the sub-frame. Anyone know the path?
If I have a lamp out indicator, It's not lit.

…bob...

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post #4 of 10 (permalink) Old Sep 21st, 2014, 3:16 pm
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Quote:
Originally Posted by haileymon
I think I found a proper fuse chart. Appears that fuse is good and power at the fuse.
NO power at the aforementioned connector on the sub-frame. Anyone know the path?
If I have a lamp out indicator, It's not lit.
There is some possible confusion on complexity and wiring chart as a 2001 USA specs K1200RS is like all early models (1997-2000), but a 2001 sold in Canada and Europe can have the newer ABS with the front nose fairing facelift.

I will assume you have a real 2001 USA specs with the simple ABS2 brake system. See attached fuse chart from owners manual. Fuse 1 for brake light and Fuse 2 for taillight and licence plate light. Test for current at the fuse-box and use Ohmmeter to check fuse in case of micro-failure not visible.

The large connector on right sub-frame (under seat) has many wires for taillight brake light and flashers. Assuming nothing was modified:
(1) Gray /Yellow wire to feed current to BRAKE light
(2) Gray / Black wire to feed current to TAIL light (always on when ignition is on)
(3) Brown wire for common ground for both wires above

If problem cannot be found at fuse or at large connector, you will have to dig further back. On a 1998-2001 USA specs K1200Rs with ABS2, the rear Tail light wiring is very simple (from ignition switch to Fuse 2 to sub-frame connector... to rear light). On 2nd generation having Integral-ABS (brake with servos), it is a whole other more complicated story....
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John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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post #5 of 10 (permalink) Old Sep 21st, 2014, 3:56 pm Thread Starter
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Exactly.
01, USA, ABS2
Volts at fuse, Fuse good, no volts at subframe connector.
Worked last time I rode. Bike sat ten days or so.
Did have an unexplained tip-over one night. Landed right side in soft bermed sand and flowers. Can't imagine that doing this. (Security light and rotor alarm now installed.)

I'm an TV engineer. Wiring and circuits my entire adult life. This is driving me crazy!
(I know, short trip)

Thanks for your input.

…bob...

01 - K12RS
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post #6 of 10 (permalink) Old Sep 21st, 2014, 4:18 pm
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Quote:
Originally Posted by haileymon
Exactly.
01, USA, ABS2
Volts at fuse, Fuse good, no volts at subframe connector.
Worked last time I rode. Bike sat ten days or so.
Did have an unexplained tip-over one night. Landed right side in soft bermed sand and flowers. Can't imagine that doing this. (Security light and rotor alarm now installed.)

I'm an TV engineer. Wiring and circuits my entire adult life. This is driving me crazy!
(I know, short trip)

Thanks for your input.
Not being familiar with you background with electrical circuits/wiring I gave too much info, just in case...

Other that your modifications, something loose, or a damaged chaffing wire somewhere between Fuse and sub-frame, I really cannot see much causing this. Let me know what you find when you have the EUREKA moment ;-)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
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post #7 of 10 (permalink) Old Sep 21st, 2014, 4:21 pm Thread Starter
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Huzzah!
Found it!

@#$%# Ignition switch.
Now to disassemble and clean that sucker.

Thanks for help and for listening.

L8R!


…bob...

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post #8 of 10 (permalink) Old Sep 21st, 2014, 4:35 pm
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Quote:
Originally Posted by haileymon
Huzzah!
Found it!

@#$%# Ignition switch.
Now to disassemble and clean that sucker.

Thanks for help and for listening.

L8R!
Not common for Ignition switch to fail, but as I said earlier on ABS2 there is not much in the tail-light circuit to feed current.

I am very surprised you had current at Fuse 2 if indeed the ignition-swich was defective. You will know when you open it. You can also find some cheap ones on EBAY, but in such case you need to re-key your other locks to match.

You should really enjoy this thread / tutorial about the ignition-switch on the other K1200 forum:
http://www.i-bmw.com/showthread.php?...light=ignition

Out for tonight....good luck!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
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post #9 of 10 (permalink) Old Sep 22nd, 2014, 10:15 am Thread Starter
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I think I must've had some intermittent volts at the fuse. Because, you're right. Bad at ignition switch would mean nothing at fuse. (at some point yesterday I removed the lamp from the holder and stuck it up in the air where I could see it better.)
So far just vigorously exercising the switch has the lights working but I saw a procedure on one of our forums on how to disassemble the electrical part from the mechanical part. Then its flush, burnish, lube and re-assemble. I ain't skeert.

Thanks again...

…bob...

01 - K12RS
72 - R75/5
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post #10 of 10 (permalink) Old Oct 14th, 2014, 6:45 pm
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Quote:
Originally Posted by haileymon
I think I must've had some intermittent volts at the fuse. Because, you're right. Bad at ignition switch would mean nothing at fuse. (at some point yesterday I removed the lamp from the holder and stuck it up in the air where I could see it better.)
So far just vigorously exercising the switch has the lights working but I saw a procedure on one of our forums on how to disassemble the electrical part from the mechanical part. Then its flush, burnish, lube and re-assemble. I ain't skeert.

Thanks again...
Since your last post (Sept-22) did you find out if ignition switch was the cause ?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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