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Old 05-09-2013, 12:09 AM   #7756
Moto13
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Quote:
Originally Posted by rycomm View Post
Try putting the bulb in the bulb holder, and then checking with the meter, at the plug. I'm guessing that with the bulb in, the power or ground is not making good enough connection with the load of a bulb. That, or maybe taking it apart and testing it will have "fixed" whatever was wrong.

Ryan
Ok, I'll try that.
Say it's the ground that is not connecting well enough...how would you fix that?
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Old 05-09-2013, 12:23 AM   #7757
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I was not able to get the voltage while the bulb is on (not enough hands), but I did notice that the voltage dropped to 5-6V after a few mins of the engine being on. I turned the high beam on and the voltage dropped to 0. Tried a few times with the same result.

I guess I'll be opening the only thing I hadn't yet - the high/low beam switch.
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Old 05-09-2013, 12:57 AM   #7758
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Ok. I opened the light switch, and I'm not sure what I'm looking for.
For one, I can't get a voltage reading. How is that done here?
This is what I'm looking at:
(you can see the turn signal switch still attached, and the high/low beam in my fingers)


close up shot...it looks good to my decidedly un-expert eyes...


How do I test voltage here?
What should I be looking for?
Thanks again!
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Old 05-09-2013, 07:22 AM   #7759
rycomm
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It may be easier if the ground lead of your meter has an alligator clip on it. Then you can clip it to a good ground (or batt) and just meter the switch ect with the pos lead. This doesn't work for everything, but for most situations it is easier than trying to hold both leads and whatever you are metering.

Ryan
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Old 05-09-2013, 05:44 PM   #7760
GeeGusKahn
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Moto13,
I agree with Ryan.
Ground your black (neg.) lead from your meter to the battery negative terminal with a clip.
Now redo all those test starting at headlight, etc.
You know that the bulb is good at this point, so see what voltage you get at high beam reference to battery negative.
Then do same with low beam.
See what you get.
Remember, this is all in reference to the battery negative terminal.
let us know.
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Old 05-09-2013, 07:39 PM   #7761
NJ-Brett
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Did you check the headlight fuse?
Its on its own in the wire harness under the gas tank, 10 amp, white, marked headlamp?
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Old 05-09-2013, 07:52 PM   #7762
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Quote:
Originally Posted by NJ-Brett View Post
Did you check the headlight fuse?
Its on its own in the wire harness under the gas tank, 10 amp, white, marked headlamp?
Yes I did. That was the 2nd thing I checked after the bulb.
All the fuses are in perfect working order, including the two spare ones.
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Old 05-09-2013, 08:26 PM   #7763
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Ok, then I would start with checking the ground to the headlight bulb.

Meter on x1 ohms, put the meter leads together and make sure the meter goes all the way up.
Put one meter wire on frame ground or the battery negative terminal.
Put the other meter wire on the black with white stripe wire at the headlight connector.
The meter should go all the way up if you have a good ground.

My next step would be to check for 12 volts at the headlight fuse, kind of hard to do, tank off, key on, motor not running...

Next is the high/low beam switch, look for 12 volts on the white wire (from fuse) and on the yellow (low beam) and yellow with white stripe (high beam).

Next is the starter button, you should have 12 volts at the Yellow with white stripe and the orange with red stripe.

Next stop is 12 volts on the orange wire on the key switch.
The key switch connector might be easier to get to.

Red feeds 12 volts to the key switch but you have to have 12 volts there since other things work.
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Old 05-10-2013, 01:31 PM   #7764
Txjack
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Headlight

Moto13, If you are supposed to have 12+ volts to the yellow wire in the previous pic. that could be the problem. The solder joint to the yellow wire looks broken. In some cases there is enough connection to show a voltage reading on a meter but not allow enough current through the wire to allow the light to work. If you can resolder that connection without damaging the switch it might work.
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Old 05-10-2013, 01:34 PM   #7765
NJ-Brett
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I am not seeing that....
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Old 05-11-2013, 07:54 PM   #7766
Red06SS
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Thumb

You won't find better looking soldered joints than the ones in the photo...
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Old 05-12-2013, 08:23 AM   #7767
jayareus
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So kind of a random question, but how many pounds of luggage do you think you could strap on to a tu250x and still be able to cruise at 60mph on a freeway?
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Old 05-12-2013, 06:14 PM   #7768
NJ-Brett
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Weight is not an issue at all (except on hills).
Its wind drag.
If you pile the stuff behind you it makes no difference.
On one of my long trips on an old Triumph, I had a tent, a big sleeping bag, a bag o tools, and a duffle bag of clothes, and a tank bag for odds and ends, and my top speed was 120 mph same as it always was.

I wonder what his top speed was with stuff sticking out the sides?

http://smg.photobucket.com/user/guzz...20964.jpg.html

I always disliked any sort of hard cases, or even saddle bags, and just piled stuff on the back seat and/or tail rack.
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Old 05-12-2013, 07:26 PM   #7769
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I posted this over on the TU site, but for those over here this is my TU250 with a mid 1960's Triumph muffler. I had to put a baffle in it to quiet it down a little.

[URL=http://s1209.photobucket.com/user/CDNbiker1/media/BB79B2C0-E610-452F-9274-8DA54B41ADF6-189-0000011ECB95954A_zps0aaa68d7.jpg.html]
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Old 05-13-2013, 02:07 PM   #7770
Txjack
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Light troublshooting

I was ref. to the photo in post#7753, yel. wire bottom left. Hard to tell if its rosen or cracked. I agree all other pics look good.
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