[sidewards]

I'm having trouble getting my high beam to work on my 93 CBR f2 (formerly a H4 bulb). My set up is dual h3 headlights, one is aimed low for low beam and the other is aimed out far for high beam. The low beam works fine but when I turn on the high beam the low goes out (like it should) but the high beam does not come on. The ground wire for the low beam becomes very hot.
The first pic is the stock plug, the second is how i set it up on my bike

These drawings are crude but give the general idea of what my setup is now.

I would also like to have both lights on for high beam. I was thinking i could bypass the switch for low beam, would that be okay? Thanks

 

[dogbreath]

Usually if people want to go from a 1-on-at-a-time setup to a 2-on-at-a-time they open the switch up and rewire it to bypass the switch.

 

[dogbreath]

And... uh... your drawings don't make any sense to me :/ I can't help! I'm confused D:

 

[sidewards]

Sorry, I'm not an electrical guy. The black slits represent were the H4 bulb tabs would slide in. I cut the h4 plug off of the harness and wired up one head light to the the low beam portion ( blue wire= ground, white wire = low beam+) and another headlight to the high beam portion (blue wire=ground, green wire=high beam+).

 

[spyder]

If your running into a problem with your ground getting hot, run a separate ground for the second bulb.

I ran my low beam direct to a constant when I turn my key on (power to a dash light, running light from a turn signal..etc) then run my high beam like its supose to run (both with separate grounds). That way I have one like on for a low beam, then when i hit the high's the other light turns on so i have 2.

If your running 2 low beams and 2 high beams Id run 2 separate grounds to a different (stronger) source. Like "left ground and right ground direct to the frame/engine/battery"

Run a couple temporary wires just to see if that fix's your problem :rock:

 

[Dragonfighter]

If the colors that you used in you diag. are teh same colors of the wires the way that you have them hooked up, the problem will be easy to solve. The way you have it wired up, you are running the high beam wires, notice I side wires, as the grounds. The F2 uses two wires for the high beam, one is blue and the other is blue with a white stripe. The green wire is your ground wire. Honda ran two wires to the high beam side, the reasoning I dont know. I almost made the same mistake when wiring in my headlight modulator. I decided to wait until I had a test light and checked the wires.

 

[Dragonfighter]

As far as I can remember, the H3 bulbs have only one element so you wont easily be able to have both lights on when you have your high beams on. It can be done but it will take some complicated electronics to get it done without causing problems

 

[sevenpointsixtwo]

Get a wiring diagram. Honda always uses green for ground. blue wires are high beam, white wires are low beam.

 

[rdannar]

This post I did from a long time ago has instructions and pics on how to do the single to dual headlight wiring.
http://www.customfighters.com/forums/showthread.php?t=4119&page=2

 

[sidewards]

This post I did from a long time ago has instructions and pics on how to do the single to dual headlight wiring.
http://www.customfighters.com/forums/showthread.php?t=4119&page=2

That is exactly how I was planning on doing it, so I'm glad to hear that it works.

I'm fairly certain that the blue wires are grounds because I disconnected the blue wire from my low beam and left the white attached. I then grounded the light to the frame and it came on like it does when the blue wire attached. I have heard that the green wire is the ground though and I have tried using it but it does not work. My harness looks to be stock so no one has been messing with it.

 

[sevenpointsixtwo]

If it's stock, green is ground. Look in any honda service manual.

 

[sidewards]

I believe you. Maybe something came lose in the crash. I'm just going to have to find my multimeter.

 

[sidewards]

I figured it out. One of the blue wires will power a light but the other won't and I have no idea why they would act as a ground at low beam. Problem solved, Thanks for the help guys.

 

[Dragonfighter]

Im not positive but I think the CBR wiring harness was used on another model and the extra blue wire was for a flash-to-pass button.