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Discussion Starter · #1 ·
Hi, I am replacing the disintegrating left hand control on my 1980 CX500D with a 2012 CBR1000RR. I have all the wiring figured out except the headlight switch. Since the CBR uses a relay it has a 2 wire switch instead of a 3 wire switch that puts power to low beam or high beam.

Following the 2012 CBR diagram it almost appears that the low beam always has power and when the high beam is switched on it applies power to both hi/low sides of the H7 bulb, but I am not sure if that's wise.

Has anyone ever used this left hand control on their CX500? Am I reading it wrong that the CBR puts power to both sides of the hi/low bulb simultaneously?

Any insight would be helpful, attached is a copy of the CBR wiring diagram with the headlight switch.

Thanks!

200143
 

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I think that on any us motorcycle the head light it’s always on. It’s powered by the ignition switch. I may be wrong maybe someone with more experience will have more info for you
 

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Discussion Starter · #3 ·
I mean on as in the low beam constantly being supplied power, even with the high beam on.
 

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Sorry my mistake.
Look like on the cbr the low bean will stay on with the high at the same time
I think they use 2 separate bulbs.
Again maybe someone with a CBR or more experience in electronic can help you out
 

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I think that the CBR1000rr has two headlamps, one is low beam, on all the time, the other is high beam, switched by the high beam switch. Others with more knowledge of the bike may correct me.
To get those controls to work properly with a single headlamp may require the use of a relay to cut off the low beam when the high beam is turned on.
 

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I'm wondering the exact same thing, but with a '79 CX500D and a 2008 CBR1000rr lol. I would really love to use the CBR switch... Did you ever figure it out?
 

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Do you have a wiring diagram for the 2008 CBR1000rr?
 

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Do you have a wiring diagram for the 2008 CBR1000rr?
I do, tried to upload the service manual I have but it's too big. I'll do some pdf editing at work later and upload just the wiring diagram. Maybe I'll even colour code it if I'm feeling fancy :)
 

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'84 CX650E that is evolving into a GL500
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I think you will have the same problem as the Original Poster with the low beam staying on all the time and only the high beam controlled by the CBR's switch. Your bike's wiring can't handle that much current (not to mention that the alternator doesn't really have enough output to run both beams at the same time and still charge the battery and the headlight's filaments won't like the heat if you run both at the same time) so it is a good idea to turn the low off when the high is on.

The best solution would probably be to use a relay to turn off the low beam when the high is on like Mike suggested last year.

BTW: Welcome to the forum. Please add your location and your bike's model and model year to your profile so that you don't have to remember to tell us every time and we don't have to keep asking when you forget (see Forum Settings link in my signature).

And welcome to the world of antique vehicle ownership (they own us, not the other way around). Your bike is about 4 decades old and may or may not have had all of the maintenance necessary to keep it safe & reliable so it is highly recommended to download the Factory Shop Manual for your model (available through the CX Wiki - link in my signature) and go through all of the service procedures, regardless of whether your bike has reached the specified mileage.
I also recommend looking on all rubber parts with suspicion because rubber does not age gracefully. Check the date codes on your tires and replace them if they are over 5 years old no matter how good they look & feel (old rubber simply cannot flow around the irregularities in the asphalt well enough to grip, especially if it is cool or wet). If your bike still has the original rubber brake line(s) (should be replaced every 2 or 3 fluid changes = 5 or 6 years) I recommend shopping for modern stainless braided ones (they last practically forever and double the life of the fluid). And don't forget things like the rad hoses and the boot between the engine and swingarm (they can crack on the bottom where you don't see it).

The best advice anyone can give you about customizing any vehicle is to get it safe & reliable in more or less original condition and use it for a while before you start making any changes so it can tell you what changes it needs to make it do what you want/need better. That approach almost always results in something you actually want to keep and use but making changes based on style or on what someone else (who may or may not really understand how the changes affect the way it works) has done often results in a piece of expensive yard art that you can't stand sitting on for more than a few minutes and might even be dangerous.
 

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The wiring diagram for the 2010 shows the headlight switch as a spdt. One side is used to control high beam, the other not connected. If that is what the switch is actually like, power could be feed through the center contact wit low and high on the left and right sides. That would require disassembly of the control to access the switches terminals.
 
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