I have one of the two horns from an '83 Nighthawk 650 available (tested as
stated above, and it sqwaks.  The other one didn't.)  $15 including
shipping.  Let me know if interested.

Todd

On Wed, Aug 11, 2010 at 8:20 PM, Sean Snell <[email protected]> wrote:

> I'd also like to chime in that on my '83 CB550 I had weird turn signal
> problems similar to the ones your experiencing and the fix was replacing the
> relay. Now I don't know about compatibility with your bike, but I ended up
> getting a relay from eBay for an '06 Kawasaki that was a direct replacement.
> I ended up paying like $15-$20ish for it versus the ~$80 the Honda
> dealership wanted (And on top of that, the part isn't even available anymore
> which is stupid because electronically speaking these things are about as
> simple as you can get). And I agree, you can test pretty much all of the
> possible causes of your issues with a 12v batter and/or a volt meter.
>
> Sean
>
> On Wed, Aug 11, 2010 at 9:33 AM, Kyle Munz <[email protected]> wrote:
>
>> Well, one at a time...
>>
>> 1. The horns. They go bad after a while. Easy way to test is to remove
>> them from the bike, take a known good 12V battery, and jump it directly to
>> the leads on the horn. It honks or it don't. If they're bad, you can buy new
>> Motorcycle horns. $80 from the dealer, or $105 for cheap looking aftermarket
>> from JC Whitney. No thank you! I bought some standard 3.5" horns from the
>> autoparts store. Some primer, and a can of black paint. Several light coats
>> and a spot of wet sanding and it came out looking pretty nice. If you're
>> really careful it's also completely possible to pry the "chrome" plastic
>> trim from the old horns and snap it onto the new ones.
>>
>> 2. Brake light. Tail lights should always be on, by design. The bulb is
>> actually a two filament bulb. One one for tail light, both on for braking.
>> That way it gets brighter. Make sure that both filaments are good and that
>> one isn't blown. The fix could be as simple as a new bulb. If that's not it,
>> check the switches. There's one on the handle bars, and one down behind the
>> foot brake. They should be normally open switches. Infinite resistance when
>> off, 0 resistance when applied. Make sure no wires are cut, etc.
>>
>> 3,4,&5. Turn signals. I'm going to put these all in one category because I
>> think there might be a common problem. The fronts are 3 wire. They are lit
>> steadily when the bike is on to make it more visible. They only blink on/off
>> when the turn signal The Dark Green wire is ground, The solid (orange/blue)
>> is the blinker wire, and the white-striped wire is the solid running light
>> wire. The rears are just 2wire. They're off usually, I guess you don't need
>> to be as visible from the rear... they only illuminate when you're blinking.
>> Easy enough to test. Remove one and put the two wires to a 12V battery. It
>> lights or it doesn't. Same with the Fronts, apply power across the striped
>> wire and the dark green and you should see light, then test with solid color
>> and dark green, again you should see light. I'll assume your turn signal
>> switch is working since it does turn the lights off, but we can test that
>> too. I'm going to make a prediction though, and start pointing fingers are
>> the turn signal relay, behind the left side cover on your bike. I never
>> found a way to test mine, I just figured it was bad by process of
>> elimination. But it was bad, I picked up a replacement from a honda shop and
>> all lights started blinking. I'm not guaranteeing that your relay is bad
>> though, don't go out and buy one until testing the other parts.
>>
>> I have a scanned in jpg of the wiring diagram for the 650 on my site. Word
>> of warning, it's from the Clymer manual and some of the colors are wrong,
>> especially around the starter button and the gear indicator switch, but it's
>> better than nothing...
>> http://munz.kicks-ass.net/nighthawk/?attachment_id=105
>>
>> Good luck ;)
>>
>> -Kyle
>>
>>
>> On Tue, Aug 10, 2010 at 11:05 AM, AustinPothast 
>> <[email protected]>wrote:
>>
>>> 1985 Nighthawk 650
>>> I know I'm not the first to post this problem but I need some easy to
>>> digest suggestions as I am a beginner with electrical.  Here are my
>>> problems:
>>> 1. Horn does not work
>>> 2. Brake light does not work when braking (although the tail light is
>>> always on)
>>> 3. Rear turn signals do not come on at all.
>>> 4. Front turn signals come on
>>> 5. When I try to use the right turn signal that signal just turns off;
>>> same with the left. Again this is front only because the rears do not
>>> come on.
>>>
>>> I have replaced all '15' fuses on the front of the bike above the horn
>>> and inspected all wires for exposure.
>>>
>>> Please help me with step by step of what you would do?
>>>
>>> Thanks!
>>>
>>> Austin
>>> 734 218 1653
>>>
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