• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

Running headlight off AC

N

not2shabby

Husqvarna
A Class
The plug under the tank has a red, blue and yellow wire; the red is hot all the time, the yellow is AC when the engine is running and the blue is ground. I have an AC regulator to wire in for the headlight, but not sure if I should use the blue ground wire or ground to the frame. Any ideas?
Thanks!
 
The blue should be grounded to the frame (confirm this) so use that one. and you're right, yellow is kinda the traditional ac out of the alternator.

But doesn't the txc have regulated dc available?
 
Yes it does, and that's how it's wired up now but if I run the headlight for an hour or so, the battery gets low. I think I may have screwed up a new WPS lithium battery by letting it get flat.
 
Is it regulated AC coming from the plug? Probably....since I bought an AC regulator. How can I test it?

I are an electrical idjit...
 
Hmmm, I just disconnected the starter pos and neg wires from the battery and connected them with the meter....it still shows 7.5 volts! How can that be?!
 
7.5v: (bike off)- make sure your meter is set at DC Volts, not AC (florescent lights, electric motors etc will induce an AC voltage) . if the bike has a capacitor (aka condenser) it will store a charge. Are there any led lights, computers etc with their own (standby) batteries? is your meter okay? (measure something else- a car for example)

Regulated AC available: probably not, the regulator is firstly the rectifier (turns AC to DC).

sounds like you have a charging system problem (that you're trying to get around rather than solve): battery or regulator or alternator or wiring. test to find which one is bad. first, take the battery out, charge it, make sure it holds a voltage (whatever it is for Li) and put a load on it (a headlight for example) for a bit and measure it. measure again in 6 hours w/o a load. if this passes, reinstall the charged battery and measure the voltage (should still be the same). start the bike up and measure the voltage- should be around 14.2v after 30 seconds. don't run the bike w/o a battery.

(edit: I just re-read some of your old posts; at this point, I'd guess your regulator is semi-bad and doesn't put out enough current to run everything and charge the battery... but this is just a WAG at this point)

good luck.
 
Thanks! Last night I disconnected the starter cables and left them off. I pulled the clutch and hit the starter button and heard a faint click. I think that discharged the capacitor since the reading went to 0 testing the circuit after that. The battery is holding a constant 13.5 volts now. I'll try turning the headlight on for a bit and measure the drop and see if it recovers after 6 hours. I do have a Trailtech vapor hooked up, but it shouldn't draw hardly anything when it's not lit up. No other lights besides the headlight, turn signals and tail/brake light.
The last time I measured the voltage with the bike running I got 14.5 when above 2.5- 3k rpm, but it dropped to about 11.5 I think as soon as I turned the headlight on. I'll try it again.
 
Ok, earlier today I turned the headlight on for about 30 seconds and the voltage dropped to 11.5. After shutting it off it went back up to 12.5.(Was holding at 13.5 before with the starter wires disconnected) Six hours later it's at 12.3. I'm thinking the battery is hosed from being run too low. Even when it's showing 13.5 volts it only lights up one of the three test lights on the battery when the button is pushed. Dayum.
 
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