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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Electrical Issues
Post Info TOPIC: Electrical Issues
vwanjau


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Electrical Issues
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Hi Team,

I am having an electrical issue with my Bike TTR 250 1994 model.

Started with the start button having a hard time to start the bike, then when to the headlight not working, then spread to the indicator lights.

The Dashboard Odometer and the break light were the last components to die.

Now the bike does not respond at all, its not lighting anything, I check the fuse close to the batter, including the one for the head light and seems to be Ok.

 

Where else can I investigate further on the issue?

Kindly Assist!!!

 

Kind Regards

Vincent Wanjau



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mossproof


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Assuming your battery is fully charged, next check all the battery connections - from the terminals to the solenoid and the earth point on the starter retaining bolt. Should all be clean and no corrosion. Also check the connections to the ignition switch - if the wires are breaking up, or the solder is giving way, that won't help.
Do you have a volt meter or multimeter for testing (or a mate with one)? Get the bike started by bump starting and check the charging voltage.
Good luck!

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TTRfan


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I'd go with Simon. Methodically check the wires and connector blocks going to the ignition switch and then to the loom.

I have found that it isn't uncommon for the main feed into the red connector block leading to the ignition switch to corrode.

You will have to remove the tank to get at it properly.

See here

Repairing OE loom 2.jpg



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vwanjau


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Hi Guys,

Thank you for the assistance, it was the corrosion on the main fuse close to the battery. I have to replace it now...The bike has electrical Power now.

Kind Regards

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TTRfan


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Good to hear you found the fault! Thanks for letting us know what it was biggrin



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mossproof


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Great result. Well found!

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vwanjau


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Thanks Guys, but now I have another issue.

The battery is not charging now, how can I go about that.

Just replaced it after I thought it was faulty but the new one is not keeping power too.


Kind Regards
Vincent

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TTRfan


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Sorry to hear that Vincent. Do you have access to a multimeter to allow you to check voltage?



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tom13


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Vincent, I bought 2 new batteries and they were wrong. Only now is Yuasa good.

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vwanjau


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wow,I dont have access to one, which component do I need to measure?

 

Thanks Grandapa Tom, it has to be a different issue, I have been using the same battery for a while now.

 

Kind Regards



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TTRfan


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According to the manual, charging voltage should be 13.0 to 15.0V at 3,000 rpm (tested using a fully charged battery).

 



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ttr steve


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vwanjau wrote:

wow,I dont have access to one, which component do I need to measure?

 

Thanks Grandapa Tom, it has to be a different issue, I have been using the same battery for a while now.

 

Kind Regards

 Doesn't  mean it can't be faulty / knackered,  how old is it?



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JOHNYBOY


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even from new can be faulty not every one would be checked

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ttr steve


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JOHNYBOY wrote:

even from new can be faulty not every one would be checked

 Yep  had to send my motobatt back the other day, as faulty from new



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mossproof


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Vincent, you will need to find a voltmeter, or preferably a multimeter which can measure voltage and resistance, to test your charging system. The only other option you have is to start throwing new parts at the bike until the problem goes away!

You start with measuring voltage across the battery terminals. 12.5 to 13v ish is normal with the engine and ignition off. Start the bike and the voltage should rise to anything between 13.5 and 14.5. If it doesn't, then you know there is a problem.

2 components need testing next. Regulator/rectifier unit (the finned aluminium block bolted to the frame under the tank) and the stator. (inside the flywheel side casing, but you will only need to check the external wires.)


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dlee22


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I had an issue with my voltage today, it was reading 11.8v when running and not charging higher. Took mine rectifier off, notices the red wires /connector was in a bad way but will clean up etc.

The rectifier was confirmed as faulty as when I re connected the girlfriends one to mine it was reading 13.5v

Hope your problem is as easy to fix

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Thanks

Daniel Lee
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