Lost Headlights and brake lights on 2003 GL1800A


Information and questions on GL1800 Goldwings (2001-Present)
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RChristensen
Posts: 6
Joined: Tue Aug 03, 2010 2:31 pm
Location: Gilbert, AZ
Motorcycle: 2003 gl1800A

Lost Headlights and brake lights on 2003 GL1800A

Postby RChristensen » Tue Aug 03, 2010 3:05 pm



First I lost one headlight then the other and the brake lights. The tail lights and the turn lights work okay. All fuses look good. This bike has the headlight strobe light system on it which I never use. Any ideas on what to check next or where I could get a wiring diagram for the bike? Thanks for any help.



RChristensen
Posts: 6
Joined: Tue Aug 03, 2010 2:31 pm
Location: Gilbert, AZ
Motorcycle: 2003 gl1800A

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby RChristensen » Tue Aug 03, 2010 6:13 pm

Update on my problems, after trouble shooting today I find the low beam headlights are both burned out, the high beam headlights are both good. Still working on the brake light problem, it looks like all the rear red lamps are on, tried checking the hand and foot brake light switch and they both seem to operater correctly. The owners manual with the goldwing is about useless unless you need to tune the radio.

Bouvier1
Posts: 106
Joined: Tue Jul 27, 2010 4:09 pm
Location: United Kingdom
Motorcycle: 2007 Gl 1800A

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby Bouvier1 » Fri Aug 06, 2010 8:18 am

The rear lights should be twin filament bulbs, check these I think that you will find that one of the filaments has gone.

Bouvier1

gareva1
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Joined: Mon Oct 26, 2009 4:51 pm
Location: Baton Rouge, LA
Motorcycle: 2008 GL1800 Prem Audio

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby gareva1 » Fri Aug 06, 2010 10:16 am

+1 , I've never had both filaments go out on these bulbs at the same time.

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thrasherg
Posts: 1837
Joined: Tue Oct 20, 2009 11:21 am
Location: Plano, TX
Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby thrasherg » Fri Aug 06, 2010 2:35 pm

Suddenly having several bulbs go at almost the same time sounds like your voltage might be a bit high!! Have you checked the output of the alternator to make sure the regulator is working and you are not getting too many volts which will cause bulbs to blow quite quickly..

Gary

RChristensen
Posts: 6
Joined: Tue Aug 03, 2010 2:31 pm
Location: Gilbert, AZ
Motorcycle: 2003 gl1800A

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby RChristensen » Sun Aug 08, 2010 11:42 pm

Update on my problem, both of the front headlights were burned out which were probably due to some rough roads I rode this summer and the bike has 64,000 miles on it and this is first time I have had to replace the headlights.

The voltage is running at 14.3 volts with a digital meter.

Checking the brake bulbs they are both good. I purchased another new one to verify they were good. Since I don't have a wiring diagram I am having a problem troubleshooting the brake wiring. The brake wires to the bulbs look to be common for both bulbs is (Green with a Red tracer). I have voltage to the (Brown White wire) which is the tail light and it is working, but no voltage to the (Green) wire which is the brake wire even when using the foot or hand brake.

Does anyone know if Honda uses a relay on the brake light system?

I checked on ordering a Service manual from the site for manuals, but they said they were out of them. Has any one purchased the CD and does it have a good wiring diagram in it? This would sure be a lot easier with a wiring diagram.

One good thing is I am learning more about how to disassemble this bike.

gareva1
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Location: Baton Rouge, LA
Motorcycle: 2008 GL1800 Prem Audio

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby gareva1 » Mon Aug 09, 2010 11:41 am

stupid question, but have you checked the fuse on the brake light circuit? Some people install trailer wiring without isolator harnesses and blow this fuse.

RChristensen
Posts: 6
Joined: Tue Aug 03, 2010 2:31 pm
Location: Gilbert, AZ
Motorcycle: 2003 gl1800A

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby RChristensen » Tue Aug 10, 2010 12:41 am

Yes I have checked all of the fuses several times that are in the fuse box, if there is any more that I am unaware of I would like to know. I haven"t had the seat off yet, but that is my next step, and I will be looking for relays or bad wire harness connections.

I really don't know when the brake lights quit and it was only because someone was following me closly and stopped to tell me my brake lights were not working.

gareva1
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Motorcycle: 2008 GL1800 Prem Audio

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby gareva1 » Tue Aug 10, 2010 8:42 am

I had a brake light modulator (wig-wag) on my bike when I bought it, but I was broken...I never noticed till someone told me...same result that you have...any chance you have such an accessory?

RChristensen
Posts: 6
Joined: Tue Aug 03, 2010 2:31 pm
Location: Gilbert, AZ
Motorcycle: 2003 gl1800A

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby RChristensen » Tue Aug 10, 2010 1:09 pm

Gareval1

I think you identified the problem, When I removed the seat I see a brake modulator glued on the relay assembly. I swaped the brake and the horn relay and proved the relay was good. Can I just remove the modulator and splice the wires back together or do I need to replace the modulator?

RChristensen
Posts: 6
Joined: Tue Aug 03, 2010 2:31 pm
Location: Gilbert, AZ
Motorcycle: 2003 gl1800A

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby RChristensen » Tue Aug 10, 2010 5:58 pm

Well everything is working on my Goldwing now. Replaced the headlights which were both burned out and removed the brake modulator like Gareva1 suggested and it fixed my brake light problem.

Thanks to everyone for the suggestions, especially Gareva1 for the heads up on the brake modulator. I did learn a lot about the bike as up until now all I have done is oil changes so this has taught me a lot about the bike.

I really do like my Honda Goldwing but I am disappointed with the help you get from Honda. The parts man had no idea that the brake lights were dual filament, he said they were single filament bulbs. I asked the service department a couple of simple questions, like did the Goldwing have a brake relay and they had no idea, maybe never seen one.

I am going to get a Honda Service manual for the bike before I have another problem.

gareva1
Posts: 318
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Motorcycle: 2008 GL1800 Prem Audio

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby gareva1 » Tue Aug 10, 2010 8:25 pm

Glad to hear you got it going---I was fortunate in the fact that when I bought my bike (used), the trunk had a spoiler on it and the brake light on it worked, so I could take my time figuring out the brake light issue as I wasn't completely brake-light-less...

My relay was wired at the back behind the license plate instead of up by the relay bank...a service book would have been very helpful, but I was able to figure it out with a simple light tester and some patience...I had never even seen what the modulators looked like before I came across it, I actually had to cut the part out and google it to find out what it was at the time. Signal Dynamics (the people who made the modulator) offered to replace the part at no cost, but I didn't bother---the spoiler light I have has a modulator in it, so I figured one was enough...not to mention the wig-wag ones like what was in the bike seem to gather too much attention from some of our law enforcement friends (even though it is legal here in the states, it's not worth fighting over to me when some small town cop wants to hassle me over it).

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thrasherg
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Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby thrasherg » Wed Aug 11, 2010 10:24 am

You definately need to find a new Honda dealer, there are very FEW bikes out there with single filament brake bulbs!! Space is at a premium on motorbikes and most use dual filament bulbs.. Glad to hear you have it sorted, I mis-understood your intial question to mean all the bulbs suddenly failed at the same time, I did not realise you had just bought it and the bulbs where not working!! Enjoy riding the bike.. You might want to consider getting another brake modulator as they really do make the bike more visible to other road users when braking!! I definately think they help avoid a rear end shunt by less than observant car drivers!!

Gary

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upssnowman
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Location: SW. Virginia live on the Blue Ridge Parkway

Re: Lost Headlights and brake lights on 2003 GL1800A

Postby upssnowman » Sun Aug 15, 2010 5:58 pm

good going I never liked the modulators seemed lilke it would be hard on the bulbs and alternater




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