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Wrencher Extraordinaire
2005 K1200LT
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There is a connector (circled in red) that goes from the headlight assy to the main harness It has a wire bail lock on it (you have to squeeze it). May have popped off.
 

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Just because you have a new bulb doesn't mean it's a good one. If you have a meter put it on ohms and check the bulb for circuit. Next put the meter on dc volts and check the contacts the bulb clips into to see if you have voltage. It's also not unheard of to have a faulty bulb socket.
 

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I have an '05 LT and the headlight isn't working. I replaced the bulb, still no luck.

Thanks.
A few more details might help troubleshooting:
1) Are both LOW-beam and HIGH-beam not working ??
2) on dash, do you see the blue high-beam indicator CONTINOUSLY even when handlebar switch is on LOW beam ??

IF all the above is answered by YES, then you have the problem of the "ground / brown wire connector" inside the headlight assy. It is a fairly common problem that affects many K1200LT and K1200RS.

To fix this, you need to remove the headlight assy from your K1200 and be handy doing small wiring job.
See above thread for photos and hints how to fix this:
http://www.bmwlt.com/forums/k1200lt/73730-headlight-brown-wire-fix.html


ON THE OTHER HAND: IF the problem is only on LOW-beam, then make sure to check the fuses as 2005-2009 models have separate fuse for Low-beam and High-beam bulbs.
- Low beam fuse located in right-side fuse-box as number 5 (rear row - 7.5 amp)
- High beam fuse located in right-side fuse-box as number 6 (front row - 7.5 amp)
 
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Wrencher Extraordinaire
2005 K1200LT
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The grounding on the 05 is different that that post shows as the high and low beams no longer share a ground. I did forget that 05 + they added a fuse to the headlights. Worth a check but a meter will really provide the best answer.
 
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The grounding on the 05 is different that that post shows as the high and low beams no longer share a ground. I did forget that 05 + they added a fuse to the headlights. Worth a check but a meter will really provide the best answer.
OOPPPSSS .... I must be getting slow or old. Thanks for correcting me on this ;-)

As John just posted, the 2005-2009 have separate headlight assy (and ground) for LOW and HIGH beam. On these, the brown wire ground problem is NOT something that is common (as it was in earlier models).

So better to go with checks of fuse(s) AND/OR voltmeter check on the applicable connector on the harness side (top connector / unit assy for LOW beam power only).
 

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Does it matter on this model if the engine is running?
 

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Does it matter on this model if the engine is running?
NO it does not matter as the lights are always ON as soon as ignition is ON on all "brick-engine" K1200. No CANBUS either on any K1200RS or K1200LT (unlike later slant-4 engines).

Only exception to above is an EURO models (called ECE in parts fiche) having an headlight switch on right-hand handlebar. These could also have been sold in other markets, but certainly not in North-America.

I am including this info and a photo, because the OP did not specify where he lives (neither did he fill his forum profile).
 

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Discussion Starter #11
The high beam is working. The High Beam light only comes on when the switch is in the high beam position. Fuse #5 was blown, I replaced it but the low beam still isn't working. No other blown fuses.
 

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2005 K1200LT
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That fuse also supplies the front running lights and the rear running lights. So if those are OK then there is a wiring issue in the front headlight. Make sure that the fuse didn't blow again when you turned the key on.
 

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I had a similar issue on my 07 where the previous owner purchased the ballast but it did not prove to be the issue. I subsequently purchased the bike and replaced the complete headlight (Xenon) assembly but still have the new ballast and the old assembly. Let me know if any of these parts would be of use to you.
 
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Discussion Starter #14
Turns out that the right front blinker causes the fuse for the headlight to blow if it has a working bulb in it. Removed it, replaced the fuse and the headlights work again.
 

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2005 K1200LT
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Did you replace the bulb or just remove it? It is the running light filament that is connected to the fuse not the blinker filament as it is powered by the turn signal module. Check for shorts around that bulb socket.
 

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I found my short on 3 wires at the bottom of the harness behind the right fan cowling that touched the top of the engine. A place you may not normally look for unless you remove the fan cowling to access the harness at this location.
 
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