GL1800Riders Forums banner

1 - 12 of 12 Posts

·
Registered
Joined
·
356 Posts
Discussion Starter #1
on my 2009 just out of the blue the left turn signal indicator on the dash began glowing and the signal on the right side was not flashing correctly. If my info source was telling me correctly, the taillights were also dim. Every time I hit the brake lever the dash indicator would light up. Sometimes it would stay on, some times it would go out. I am thinking bad ground but hoping there is some common easy fix, otherwise it's back to the dealer as the bike is only 2 months old. After messing with brake lever and turn signal switch, the problem went away. I also shut off the bike and turned it on again. We went on our ride anyway and it did it once more but after that, the problem did not reoccur and all seemed to work fine. four way flashers worked fine. When I was looking at the lights, I thought the left side was affected, not the right side but I don't argue with the wife and couldn't get the problem to replicate again.

When I pulled up to the garage at the end of the light, the problem occured but I wasn't able to check the actual lights. At this point the symptom is a glowing left turn indicator light that comes on when the front or rear brake is activated and sometimes stays on even after the brake is released. Turning the signal on or off doesn't seem to have an affect.

Any ideas?
 

·
Registered
Joined
·
421 Posts
Check the large wiring connector under the passenger area of the seat. There is one small wire (green if I remember correctly), which supplies the negative for the stop, tail & turn signals. This wire may have a bad connection in the plug.
I have seen this happen on some earlier models with the same symptoms that you described.

The fix was to cut the wire on both sides of the connector and splice it together.
 

·
Registered
Joined
·
927 Posts
:agree: Similar thing happened to me only I supplied the circuits downstream of that connector with a compleyely new ground.

Ride Safe
Ken
 

·
Registered
Joined
·
626 Posts
Yep ground problem, most likely in the plug under the seat that GLO5 is refering to. Yes, the green wire is the ground.
 

·
Registered
Joined
·
356 Posts
Discussion Starter #6
Gentlemen,

THANK YOU! Great to be able to reference instant information. I am real an al about riding a bike without everything being just right. It's a sinking feeling when your new bike exhibits symptoms of illness at only 1000 miles and the following two days are perfect for riding.

I suspected this to be a ground issue but didn't know where to start looking. This is definitely going to be a dealer warranty repair, but if push comes to shove and it keeps acting up, I know I can pull the seat and wiggle the connector. I am hoping it doesn't act up today or tomorrow. I fully intend to catch up on some miles!
 

·
Registered
Joined
·
8,038 Posts
You can use Hand Signals until the weather gets bad again...:lol::lol::lol:
 

·
Registered
Joined
·
5,541 Posts
Check the large wiring connector under the passenger area of the seat. There is one small wire (green if I remember correctly), which supplies the negative for the stop, tail & turn signals. This wire may have a bad connection in the plug.
I have seen this happen on some earlier models with the same symptoms that you described.

The fix was to cut the wire on both sides of the connector and splice it together.
I had this problem 3,000 miles from home, didn't find it then but moving the wires around while I was in a Nashville motel parking lot fixed it till I got home.

I started installing my Bushtec Trailer hitch the following Spring and noticed the rear lighting was acting weird again. After a lot of poking and prodding I found the problem. The main wiring connector under the seat that connects all the rear lighting. The green ground wire circuit inside the connecting block had arced the connecting spades into an intermittent connection. It had actually burned the ends off the metal connectors inside the plastic housing. I made a temporary fix by quick connecting a bypass wire around the connector for the ground wire. (All other connectors inside the housing appeared to be undamaged).



After confirming the problem was fixed, I cut the ground wire from the connector, then soldered in and shrink wrapped the bypass wire, no more problems. Rear light seems brighter now too!

Two things about taking this problem to the dealer (based on others experience whom have already gone down this road).

First they (The dealer) may claim the problem is your fault for adding additional lighting to the Factory circuit, (I had added Showchrome saddlebag and trunk molding LED lighting on this circuit, plus a Hondaline Interior Trunk Light). This may be true, but Honda is the one that has installed an inadequate ground circuit.

If they do decide to fix the problem, it will involve replacing the entire affected wiring harness's. Figure several weeks of down time at a minimum and you will end up with brand new factory wiring, with the potential for the exact same problem reoccurring!

For me, soldering a piece of scrape wire was a lot better option. This is a fairly common problem that can be a bear to trace down...
 

·
Registered
Joined
·
366 Posts
I've just had this same problem on my '06 model bike:

  • no tail or brake lights
  • indicator lights all glow dull constantly (including the ones in the dash)
  • no indicator function
  • no hazard light function with ignition on (though, oddly, they did work fine with the key in the Accessories position)

After checking all fuses and finding none blown, I realised that it sounded like a ground problem. So I ran a temporary jump lead from a tail light ground to the bike's chassis and that instantly fixed the problem.

A quick search on this forum soon revealed a known issue with the ground signal passing through the trunk/saddlebag sub-wire harness connector (14-pin gray) under the seat - and sure enough that was the cause.

My 1st photo shows where it is located on '06-and-up bikes - note that it is C31 rather than C15.



The next photo shows the female pin for the ground signal - note how it seems to have partially disintegrated!



That seems very bad for a bike which is only just over 2 years old (though it's an '06 bike, it's one of a number imported into the UK by Honda in 2010 which had sat in crates for 4 years, apparently). That location in a boot under the seat can't have seen much in the way of bad weather. Here is a close-up of the pin.



The next photo shows the MALE pin for the ground signal - it doesn't seem much different than others in that connector (maybe just a little pitted in places).



The final photo shows how I snipped the ground wires entering each side of the connector and soldered on wires with bullet connectors to make a jumper lead round the connector.

 

·
Registered
Joined
·
3,537 Posts
Good write up with Pics, Big Wing.

Had the same problem last summer. In addition to the ground wire, a power terminal next to the ground, also showed signs of heat. Bypassed both wires, and like you, put a disconnect in them, so if I ever had to seperate the plug, I could unplug the bypass wires.

The wires & pins are very small, appear to be about 16 Ga. I suspect adding Trailer lights puts more load on them than they were designed for.

But, yes....this is a common problem.
Apparently some dealers are not aware of it. I stopped in Frederick, MD. when mine was acting up, and they simply said..."Can't help you, we never heard of that before.

After I got home, Waldo & Techdude walked me through the diagnostics and repair, here on the forum.
 

·
Registered
Joined
·
311 Posts
Exact same problem on my 06. This save me hours if I had followed the manual instead.


My connector "LOOKED Good" but was not. I bent the male end slightly and all works now. I will do the bypass so it does not come back.


BIG THANKS!
 
1 - 12 of 12 Posts
Top