electrical issue is rear light - BMW Luxury Touring Community
 
LinkBack Thread Tools Display Modes
post #1 of 8 Old Nov 3rd, 2016, 9:01 am Thread Starter
Member
 
anarchosteff's Avatar
 
Join Date: Jun 2015
Location: Titusville, FL
Posts: 79
Garage
Question electrical issue in rear lights

On my 2000 LT, somebody pointed out that my rear left light was not illuminated. I figured out that there are three double filament bulbs in the center: 12V 21W & 5W ... and the bulb on each side (turn signals) are single filament bulbs: 12V 21W. I've confirmed all the bulbs are good. I even swapped the turn signal bulbs. The left bulb DOES illuminate when engaging the left turn signal. However, it does not illuminate at what appears to be a lower voltage, like the right one, when simply in running lights mode.

So, which light is at fault here? Is the left one supposed to light up dimly, like the right one, in "running mode", or is the right one not supposed to do that at all? I'm almost inclined to say there's an issue with the right side, but I don't know what is "normal".

... and after you guys help me figure out which side is the problem, where do I start looking? ... since this isn't just a burnt out bulb.

Thanks,
Steve
Titusville, FL
Attached Thumbnails
Click image for larger version

Name:	IMAG2253.jpg
Views:	36
Size:	115.7 KB
ID:	118377  

Last edited by anarchosteff; Nov 3rd, 2016 at 10:35 am.
anarchosteff is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old Nov 3rd, 2016, 11:52 am
Senior Member
 
bmwcoolk1200's Avatar
 
Join Date: Feb 2015
Posts: 3,998
Re: electrical issue in rear lights

Quote:
Originally Posted by anarchosteff View Post
On my 2000 LT, somebody pointed out that my rear left light was not illuminated. I figured out that there are three double filament bulbs in the center: 12V 21W & 5W ... and the bulb on each side (turn signals) are single filament bulbs: 12V 21W. I've confirmed all the bulbs are good. I even swapped the turn signal bulbs. The left bulb DOES illuminate when engaging the left turn signal. However, it does not illuminate at what appears to be a lower voltage, like the right one, when simply in running lights mode.

So, which light is at fault here? Is the left one supposed to light up dimly, like the right one, in "running mode", or is the right one not supposed to do that at all? I'm almost inclined to say there's an issue with the right side, but I don't know what is "normal".

... and after you guys help me figure out which side is the problem, where do I start looking? ... since this isn't just a burnt out bulb.

Thanks,
Steve
Titusville, FL
I just swapped out all my turn signal bulbs for brighter LED bulbs and the turn signals even though they flash faster from the lower current draw but do not illuminate unless the turn signal is engaged. I can fix the fast flash if I wanted to but I figured it would grab more attention so I left it that way. I honestly never noticed if they were dimly lit before I swapped them out but they are not lit now.

Gordon
Sugar Hill, GA
2001 K1200LTI Champagne (current ride) Lazy Susan
1998 R1100RT Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
bmwcoolk1200 is online now  
post #3 of 8 Old Nov 3rd, 2016, 10:06 pm
Senior Member
 
Mark65's Avatar
 
Join Date: Sep 2015
Location: Glendale, AZ, USA
Posts: 178
Re: electrical issue in rear lights

My turn signals do not illuminate until the signal is engaged, so it appears that the issue is that your right lamp IS lit, not that the left one isn't.

Mark

Mark(Big Poppa) and Julie(Fireball)
'06 K1200LT Magnesium Black "Stella"
Glendale, AZ
BMWMOA#206887
RA#44657
AMA#3647653

Let's Ride!
Mark65 is offline  
 
post #4 of 8 Old Nov 3rd, 2016, 10:24 pm
Senior Member
 
Daveh's Avatar
 
Join Date: Mar 2005
Location: Reisterstown, MD, USA
Posts: 271
Re: electrical issue is rear light

The stock turn signal sockets are turn signal only from the factory. I changed all four of my turn signal sockets to work with duel element bulbs for turn signals and running lights. The stock sockets only have two wires, I added a third wire for running lights. This doesn't help you but , how many wires to each socket front and rear. Are there running on the front. If you have three wires back track the added third wire connections. If you only have two wires at each socket, why is it lighted again check wire connections in socket. Good luck, you'll have fun chasing this down.

Dave

2003 K1200LTC Titan Silver
BMWBMW, BMWMOA, AMA, IBA


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Daveh is offline  
post #5 of 8 Old Nov 4th, 2016, 10:57 am Thread Starter
Member
 
anarchosteff's Avatar
 
Join Date: Jun 2015
Location: Titusville, FL
Posts: 79
Garage
Re: electrical issue is rear light

Thanks guys. It is really starting to seem like the right is the problem. I've even now noticed that it is intermittent. It was acting fine early this morning ... i.e. not illuminated. By the time I got to the office, 35 mins later, it was on.

I know I have a smattering of electrical issues. I have a bad connection in my speed sensor cabling ... my odometer has been just bouncing around for about 18 months. I also get random numbers displayed in my gear indicator for a couple days after it rains.

-Steve
anarchosteff is offline  
post #6 of 8 Old Nov 4th, 2016, 12:12 pm
Senior Member
 
Join Date: Apr 2002
Posts: 14,436
Re: electrical issue is rear light

You may have found the fix for your erratic speedo problem, but in case not - take a read thru this.

Erratic speedo, possible fix
Dick is offline  
post #7 of 8 Old Nov 4th, 2016, 5:21 pm
Senior Member
 
Axle's Avatar
 
Join Date: Oct 2007
Location: portland, victoria, Australia
Posts: 1,482
Garage
Re: electrical issue is rear light

there is either a short going to the turn signal keeping it live or the divider between the tail lens and indicator lens is missing, your indicators should not be on with the tail light, it could have been wired for a trailer have a good look around under the seats for extra wires

Regards Linton
From the land of Kangaroo's and Koalas
and no koalas are not Bears



2002 K1200LT
2010 Suzuki GSX 1250FA (the Wifes)
2004 Cub Kamparoo Sprint
My Toys
1976 Datsun 260Z
1989 Nissan 300zx TT
Axle is offline  
post #8 of 8 Old Nov 5th, 2016, 9:39 pm
Member
 
Join Date: Oct 2016
Posts: 39
Re: electrical issue in rear lights

It's funny how indicators have got lost in translation. In the U.K. ours stay off until used and in the US yours stay on and then flash. Surely you have it right and we have it wrong!


Sent from my iPhone using Tapatalk
MarkSSL is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Rear light connector how to? Poul K1600GT/GTL 3 May 16th, 2015 12:30 pm
Rear Brake Light Will Not Turn Off. falcon1200lt K1200LT 6 Mar 31st, 2012 12:44 am
K1600 / Unigo Lights Wiring old1951 K1600GT/GTL 11 Jul 16th, 2011 2:16 pm
Rather longish, but good tips & info! vvk Bike Talk 7 Jun 19th, 2011 5:43 pm
How many forum posters does it take to change a light bulb? brianbeemer Humor 24 Mar 26th, 2010 2:46 pm

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome