Flickering lights and turn signals - BMW Luxury Touring Community
 
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post #1 of 4 Old Mar 20th, 2012, 6:35 pm Thread Starter
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Location: Fleetwood, Pa, USA
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Exclamation Flickering lights and turn signals

While riding to work this morning, noticed thar the headlight started to flicker. Upon acceleration, it would go away, then come back. Also went away under deacceleration. Also noticed that every thing in the dash board was also flickering at the same time. Got home after work, and noticed thar if I leave the bike idle, no problem, but with reving it up in the garage, the same thing happens. Heated seats and grips work fine, and bike also seems to run fine. Alternator, voltage regulator, or simply a bad ground??? Bike is a 2000 LTC with 77k miles on it. Any suggestions would be greatly appreciated. Thanks, Steve Miller
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post #2 of 4 Old Mar 20th, 2012, 8:10 pm
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Re: Flickering lights and turn signals

It is a bad ground on the starter. There is a single 5mm allen head bolt at the rear of the starter that provides a good ground during operations other than starting. The load shed relay gets its ground through the starter and this bolt. When it gets loose you typically get the flickering dash and lights from the relay chattering at about 3,000 rpm. You have to pull the battery to get to it.
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John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #3 of 4 Old Mar 21st, 2012, 10:53 pm
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Location: Waconia, MN, USA
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Re: Flickering lights and turn signals

John's comments on the loose 5mm bolt is valid as we discovered late on Friday evening a
few years back at the Spring Training Camp at the Ironhorse Lodge.

After spending a day running around 6,000 to 7,000 RPM over the Cherohala Skyway
(http://www.cherohala.com/) looks like I rattled a this bolt loose. After a few electrical
checks and referring to the proper wiring diagram - John had an ah ha moment. We went
right to the bolt and found it was loose. I was riding around for 1/2 a day flashing all the
lights everywhere - did not effect the starting or any other electronics.

Make no mistake this bolt is hard to get to and you will need to take the battery out and look
forward down towards the front of the bike with a flashlight. Then you will need a long
extension allen wrench with a rounded tip to get at the bolt - at an angle!!

BTW it pays to have a friend like John and fellow BMW rider / all around good solver of all
things mechanical - who else travels the highways and byways with a compete set of wiring
diagrams for the K1200LT!!!

Dan Finazzo
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post #4 of 4 Old Mar 22nd, 2012, 8:41 am
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Re: Flickering lights and turn signals

You are not so bad to have around either, Dan.

Antony (Tripod)
Dallas' Northern Suburbs
-----------------------------------------------

If you want to be happy for a day, drink.
If you want to be happy for a year, marry.
If you want to be happy for a lifetime, ride a motorcycle.

-----------------------------------------------


'05 K1200LT - Dark Graphite - RIP 04 OCT 2015
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