Note: I'm about to give up on this lightbar, it broke after two weeks.
One of the the L brackets that are welded on to mount it to the bike broke, not the weld itself. The info below is what I originally wrote up before it broke.
Just bought this lightbar second hand, it's spotless though (ha ha, didn't mean it that way). It came without instructions and without mounting hardware or anything and the wires were all clipped (don't know if they were that way originally or not).
At first I though I'd have to drill holes on the fork clamp (is that what it's called?) but after some looking around I discovered that there's already pre-drilled threaded holes on the bottom, yahoo... a simple bolt-on.
I counted the wires, saw that there were six. Having popped out one of the headlights just to see what's in there I notice that the bar itself is acting as the ground hence the lack of a ground wire. I used a 9v battery to trace which wire goes to which filament, left and right spots and inner and outer filaments on the turn signal bulbs. I marked them off with tape so I won't have to go through it again.
First I took off the OEM front signals and clipped the wires a a good working length. I got a set of male and female wire connectors to make it easy and neat. Put female ends on the wires I just clipped (the outer housing keeps bare wire from hitting any part of the frame while I'm still working.
Having done that I bolted the bar on using some stainless steel bolts from the hardware store (6 x 1 x 10 I think). I was sure to get SOLID bolts because I've heard of bolts breaking off for others.
The first thing I wired up was the turn signals. I started out by running an extra ground wire from one of the bolts holding on the light bar to one of the ground wires that was part of the turn signals (yellow black wire) since the light bar itself is the grounding point for the lights in it. I put male connectors on the four wires that were for the turn signals and simply plugged them into the bikes original wires. Tried them out, found out that it was backwards (blinker/running) and just reversed them (where using connectors come in handy) and it worked fine.
I notice that the brain surgeon that designed this light bar (National Cycle) has the opening for the wires on the TOP of the light bar facing UP. To me this means it's just an easy way for rain and such to fall in there and pool. I took a tube of silly-cone and filled it right up. I also notice that on their web page for quite a while now (I'm just speculating) that any time you try to get info or pics of their light bar that you get a page not found, maybe they gave up on them.
Anyway I still have two things left to do. One is to wire up the spots themselves and to tighten them down (they tend to go off center after a bunch of highway riding). So I get out my shop manuals to find a decent wire to tap into. Well according to the manuals (both) there's a yellow/white auxiliary wire going into the headlight. I search around the wires going into the headlight looking for this wire thinking I can just fish it out. I couldn't find it so I just decided to get back to it later, I had the turn signals done and that was the important thing at the moment. I went on to finish getting the other wires in place. When I was at the store I also picked up a plain two wire toggle switch so I could turn off the spots at times when I didn't want them running such as stop and go riding and such. I didn't know at the time that I NEEDED the switch because the aux power wire that I was going to use is hot ALL the time not just when the key is on. Using the connectors I made a two into one adapter for the two spot hot wires and ran the one wire to the toggle and another wire from the toggle tied off near the headlight for hooking up later.
The toggle switch at this time is simply tie wrapped to the handle bar (neatly) while waiting for some handle bar clamps to arrive that I'll use for mounting.
Some days later I find time to take out the headlight to get at the "yellow/white" aux wires. Why couldn't I find them when I was fishing around before? THE STUPID THINGS WERE BLUE/WHITE!!! Anyway I just plug in the wire I had tied off earlier and it's all working now. If I get around to it I may search out a better place to hook it up so I don't have to depend on remembering to turn them off when I turn off the bike.
Where did you want to be today?