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  #11  
Old 07-20-2011, 12:54 PM
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Let's be clear on the marking convention. W/B means White with a black stripe(tracer). The letter(s) before the slash refers to the main color and after the slash refers to the stripe color. See the color code in the wiring diagram. B is black, Bl is blue, Br is brown, Gr is gray, G is green Lg is light green for example.

The gray wire is the tail and license light hot. The white/black (W/B) wire is the brake light hot. Black/white (B/W) is always ground.

Just about any wire that is not B/W is hot but there is more to it than that. Such wires may be always hot, hot only when the ignition is on, hot only when a switch or sensor is engaged and some vary in voltage and interact with the computer. Don't guess and don't use a test light as it can cause expensive computer damage. Very few colors can be used as a trigger wire. O/G is good because it has the extra capacity to run heated grips and only feeds comparatively low draw lights. O/W is bad because it runs the coils and fluctuations in coil voltage can cause problems. Brown is good if it's okay to be hot when the ignition is in Park. Brown turns to gray crossing from the chassis to the rear fender.
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  #12  
Old 07-20-2011, 02:44 PM
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You can sometimes deduce what wire is what. In the tail light the grey wire runs to both the licence plate light and the tail light bulb. The licence plate light is always on, therefore the grey wire is the running light circuit. The white with black stripe must be the brake light, because the only other wire is black with a white stripe, which we know is the negative ( aka ground) wire. This works on most, if not all bikes.
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Old 07-20-2011, 03:01 PM
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The best thing you can do with a wiring diagram is to ignore the middle. Seriously. It's a nasty mess. Concentrate on the stuff around the rim. Find the gadget of interest, take a look at the wires that go in and out of it and work from there. Only when you absolutely need to see where a wire goes should you trace it through the middle.
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Old 07-20-2011, 03:17 PM
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Maybe I'm missing something, but personally, I'd rather just put a multimeter on the leads and determine empirically what does what, where tail and brake lamps are concerned. I don't see a wiring diagram as worth the trouble back there.

Any day that I find myself needing a vehicle wiring diagram is a day that probably ended badly for me.
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Old 07-20-2011, 03:50 PM
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As an example, using a meter will find all sorts of 12V wires. Using one to power something can cause problems. The O/W wire is a fine example. It tests greats as a 12V source but can cause firing problems if used as a power source. Use a O/G, Br or Gr wire to trigger nothing more than a relay to turn on a fuse block and use the fuse block to power accessories.

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Old 07-20-2011, 04:01 PM
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Quote:
Originally Posted by greywolf View Post
As an example, using a meter will find all sorts of 12V wires. Using one to power something can cause problems.
Let me reiterate that I was talking about the wiring aft of my seat. There's nothing in the tail cap that will cause a problem if tapped for a low-draw source. It's just lighting.

Fore of that, I wouldn't rely on a meter to tell me what's what, agreed.
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  #17  
Old 07-20-2011, 04:21 PM
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For wires to lights only, a meter is fine.
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See http://www.stromtrooper.com/general-...nicknames.html

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