Headlight Issue 2019 CB300R - 2018+ Honda CB1000R, CB300R, CB125R Forum
 2Likes
Reply
 
Thread Tools
post #1 of 13 (permalink) Old 09-08-2019, 02:41 PM Thread Starter
Junior Member
 
Bassface's Avatar
 
Join Date: Sep 2019
Posts: 15
Headlight Issue 2019 CB300R

Hi everyone, wanted to get some insight into this.

Few days ago I noticed my headlight (low-beam) brightness fluctuating above 5000rpm. Immediately thought of a voltage issue or stator malfunction, etc. However, I rode about 500km yesterday and the headlight is constantly flickering. High beam is fine, turn signals, instrument panel, brake light, etc are all good.
Only the low-beam seems to have an issue, and only when there is vibration through the chassis. This makes me think it is not an electrical system issue but a connection problem. It seems to be frequency related as going over rough pavement does not affect it.
Sometimes the low-beam turns off completely but if you give the headlight assembly a nice tap with your hand it comes back on. Also if you rev above 5000rpm when stationary it flickers.
Here’s the complication: I checked the manual for the lightbulb section and Honda says something to the tune of “your motorcycle is equipped with all LED bulbs and if any are off, see your dealer.” The manual has oil change instructions but no bulb change? Surprise to me.
I’ve been working in car dealership service dept. for a decade, I can do basic mechanics myself. So I opened the headlight assembly and found that unlike in a car where the connector from the wire harness goes to whatever bulb, the connector in our assembly goes to another connector inside the headlight. Took some pictures and attached.
There also looks to be some sort of PCB inside the headlight assembly but I did not risk completely disassembling it yet.
Appreciate any thoughts as to how to check the issue without the local Honda dealer bending me over? I’ve wiggle tested the wires while the light was on, reconnected the connectors, shook it around to no avail.
Also anyone else have experience with this bike’s front lamp? Is it designed to be disassembled?
Thanks in advance!
Attached Thumbnails
Click image for larger version

Name:	4B3CDDD2-0354-42A7-BCC1-0DBC5CFBE412.jpg
Views:	20
Size:	135.9 KB
ID:	434   Click image for larger version

Name:	4F3A8606-1453-456B-9029-53F0CB9D8B89.jpg
Views:	19
Size:	196.5 KB
ID:	436   Click image for larger version

Name:	AA38C618-64B6-4414-B29D-A752C4716C8D.jpg
Views:	18
Size:	85.6 KB
ID:	438   Click image for larger version

Name:	3C45A077-EF8F-4746-8707-93ADD5E74229.jpg
Views:	18
Size:	203.6 KB
ID:	440  

Last edited by Bassface; 09-08-2019 at 02:47 PM.
Bassface is offline  
post #2 of 13 (permalink) Old 09-08-2019, 10:00 PM
Junior Member
 
cb300rider's Avatar
 
Join Date: Sep 2019
Location: Regina Saskatchewan Canada
Posts: 8
Wouldn't your bike still be under warrantee? Let the dealer do their job of fixing something like that. You probably don't want to start trying to repair something only to worsen the situation and now you have a chronic electrical issue. Just my opinion though.

Regina CB300R rider
cb300rider is offline  
post #3 of 13 (permalink) Old 09-08-2019, 10:39 PM Thread Starter
Junior Member
 
Bassface's Avatar
 
Join Date: Sep 2019
Posts: 15
No unfortunately the warranty was 12 months so that ended in July. I’ll take it there if I have to, just wanted to see if there was a hope of DIY before I do. Not the most convenient place in the world to go 🙂
Bassface is offline  
post #4 of 13 (permalink) Old 09-09-2019, 02:16 PM
Jay
Member
 
Join Date: Oct 2018
Location: Idaho Falls, Idaho
Posts: 36
The headlight isn't going to have standard headlight connectors with removable "bulbs", of course, because they're LED in a special offset parabolic reflector. LEDs have special-purpose drivers (electronics to convert battery voltage down to the low and highly regulated 1.5V or so that the LEDs require). You can see the driver in action when the lights don't vary brightness at all whether the engine is on, off, or engine starter engaged. No doubt the low beam driver is intermittent. The Helm manual doesn't give us any clue about the electronics in the headlight assy. No separate parts sold either. The whole assy must be bought. Babbits has it for $286.13. Your dealer will likely be even higher. My plastic LED cover took a stone and has a nasty scuff on it. They sell the cheap plastic cover separately, right? No.

What I would do in your case is disassemble the headlight as much as possible to get at the driver and just make a visual inspection of all the connectors and solder joints. A problem might show up that you can fix. You could re-heat all the solder joints with an iron and some flux. Maybe you'll fix a cold joint. Maybe you can identify the driver part # and buy it separately from Mouser or Digikey. Good luck.

Last edited by Jay; 09-09-2019 at 02:21 PM.
Jay is offline  
post #5 of 13 (permalink) Old 09-09-2019, 02:44 PM Thread Starter
Junior Member
 
Bassface's Avatar
 
Join Date: Sep 2019
Posts: 15
Really appreciate it thank you! I’ll give it a go.
Bassface is offline  
post #6 of 13 (permalink) Old 09-17-2019, 03:07 PM
Member
 
JACoH's Avatar
 
Join Date: Aug 2018
Location: Blue Jean, Oregon
Posts: 81
I would mention it to the dealer, and if no satisfactory solution, contact Honda Customer Service. This sounds like a safety issue. I can just see the NHTSA reporting "and if the headlight flickers off during a nightime, rainy event, driver could lose control and a crash could occur."
JACoH is offline  
post #7 of 13 (permalink) Old 09-18-2019, 03:13 PM Thread Starter
Junior Member
 
Bassface's Avatar
 
Join Date: Sep 2019
Posts: 15
Exactly what I did. To their credit Honda Customer Relations is great. I didn’t have to even ask and they are covering the part under goodwill (dealer is covering the labour). I’ve worked at a Honda dealer (automotive) as well as other brands and have to say it was always easier to have stuff warrantied with Honda.
Bassface is offline  
post #8 of 13 (permalink) Old 09-19-2019, 11:56 AM
Jay
Member
 
Join Date: Oct 2018
Location: Idaho Falls, Idaho
Posts: 36
I'm glad you had a good resolution. I was going to suggest you sell the bad one on ebay. I would buy it. I'm pretty sure I could fix it.
Jay is offline  
post #9 of 13 (permalink) Old 09-19-2019, 07:12 PM
Senior Member
 
Join Date: Dec 2017
Posts: 162
Quote:
Originally Posted by Jay View Post
I'm glad you had a good resolution. I was going to suggest you sell the bad one on ebay. I would buy it. I'm pretty sure I could fix it.
I bet there are many others too, even globally, looking to do the same thing. Couldn't be a better time to let go of parts you don't need.
RedWing is offline  
post #10 of 13 (permalink) Old 09-19-2019, 07:22 PM Thread Starter
Junior Member
 
Bassface's Avatar
 
Join Date: Sep 2019
Posts: 15
Good point especially that the part is $500CAD.
Bassface is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
New CB300R owner in Saskatchewan cb300rider New Members Introduction 4 09-08-2019 09:57 PM
First Look: 2018 Honda CB300R Administrator Honda CB300R Neo Sports Cafe Forum 9 08-10-2018 06:24 PM
Honda Announces U.S Availability of 2019 CB300R JTommy Honda CB1000R, CB300R And CB125R Neo Sport Cafe General Discussion 6 06-01-2018 08:01 PM
Honda Neo Sports Cafe Series Overview Administrator 2018+ Honda CB1000R, CB300R And CB125R News 2 03-06-2018 01:42 PM
2019 Honda CB300R Geared For Canadian Release Neo Sport Cafť News 2018+ Honda CB1000R, CB300R And CB125R News 5 02-03-2018 08:18 AM

Posting Rules  
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

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