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Forearm of Steel
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2,581 Posts
Discussion Starter · #1 ·
So I'm trying to wire up my dominator headlights... correctly this time.

Based on my wiring diagram, I've got 3 wires coming in:

Red/yellow - connected to "low" on handlebar dimmer switch
Red/black - connected to "high" on handlebar dimmer switch
Ground

I've also got 3 wires coming out of the headlight

Yellow - low H4 beam
White - high H4 beam
Black - ground

Problem is, I can't get the dimmer switch to dim between the two... Neither the red/yellow or the red/black show 12V at any position of the dimmer switch.

I just looked again at my original wiring, and I don't even have the right wire hooked up ATM. I've got a brown wire that originally showed 12V no matter the position of the dimmer switch, and then another wire that showed 12V when "high" was selected.

If anybody could lead me in the right direction, that'd would be awesome. I'm stuck at this point. If you need pictures or whatnot, please don't hesitate to ask.

EDIT: Just went out and made sure I'm looking at the right wires, etc. Checked the voltages again to make sure... Neither the red/yellow or the red/black give me +12V no matter what. I've checked the fuse, etc, and nothing. I'm afraid I may be stuck with highs only no matter what. Please help!
 

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Premium Member
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661 Posts
Sounds like the low beam comes on with the key(constant power) with a switched high beam.(the other wire you were talking about) I would hook them up like that. Or if you want to run with the low beams off you will need to add a switch. Is it a Canadian bike? I think Canadian bikes have to run with low beams off of the key
 

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Forearm of Steel
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2,581 Posts
Discussion Starter · #3 ·
I am so confused... this really sucks. I've checked all my fuses and everything looks fine. I've checked the wires from the front all the way to the coils and I can't find anything wrong.
 

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Forearm of Steel
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2,581 Posts
Discussion Starter · #4 ·
Sounds like the low beam comes on with the key(constant power) with a switched high beam.(the other wire you were talking about) I would hook them up like that. Or if you want to run with the low beams off you will need to add a switch. Is it a Canadian bike? I think Canadian bikes have to run with low beams off of the key
I understand the principle behind it... Its just not working at all. I can't get +12V outside of a wire that's not supposed to be connected to anything but the horn, horn fuse, and the ignition.
 

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Forearm of Steel
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2,581 Posts
Discussion Starter · #5 ·
I've got an idea but I'm not sure - going to go test it out right now. I think my bike may only provide +12V on the proper leads when the bike is running. Back in an hour or so.
 

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534 Posts
I've got an idea but I'm not sure - going to go test it out right now. I think my bike may only provide +12V on the proper leads when the bike is running. Back in an hour or so.

Having no clue what type of bike you are working on, I have an f2 cbr, it only provides power to the low beam when running. As long as it is running, the low beam is always on.
 

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Fooking old git
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2,216 Posts
Yep the type of bike helps, my sons Gilerea only powers the lights when the engine is running.
 

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Forearm of Steel
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2,581 Posts
Discussion Starter · #8 ·
Sorry guys, it's a 1997 Kawasaki ZX7R

Got it working though - the 2 wires I needed to provide voltage to run the low/hi beams only have voltage when the bike is running.

Took a little longer than an hour though ;) I spent a lot of time soldering connections
 
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