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Ignition light staying on ?


D412REN
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Do you know if it's running a dynamo or alternator? Either way, whichever one of these devices driven by the fanbelt isn't putting out power so your battery isn't getting charged.

Check for loose / unattached cables in the first place. If it's a dynamo it may have a broken or missing brush. Or could be a couple of other things. Does the warning light change if you rev the engine, or is it solidly on whatever happens?

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8 hours ago, PeteStupps said:

Do you know if it's running a dynamo or alternator? Either way, whichever one of these devices driven by the fanbelt isn't putting out power so your battery isn't getting charged.

Check for loose / unattached cables in the first place. If it's a dynamo it may have a broken or missing brush. Or could be a couple of other things. Does the warning light change if you rev the engine, or is it solidly on whatever happens?


The light is permanently on 

thanks. 
Darren. 

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22 hours ago, PeteStupps said:

Do you know if it's running a dynamo or alternator? Either way, whichever one of these devices driven by the fanbelt isn't putting out power so your battery isn't getting charged.

Check for loose / unattached cables in the first place. If it's a dynamo it may have a broken or missing brush. Or could be a couple of other things. Does the warning light change if you rev the engine, or is it solidly on whatever happens?

No it stays the same. ?

 

13 hours ago, RobPearce said:

As Darren said, it could be several things, so we need more information. Is it a dynamo or alternator? If you're not sure how to tell, post a photo of the engine bay (preferably from the front left) and we'll be able to tell you.

Dynamo 

 

9 hours ago, Velocita Rosso said:

Broken small gauge wire from source to ign lamp is either broken or not connected

What colour cable would that be please

many thanks. 
darren. 

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24 minutes ago, glang said:

Im really struggling to see how a having a wire disconnected can keep the ignition light on?

Indeed.

Well, specifically, I cannot see how losing the wire VR appears to be describing could do anything other than ensure the light NEVER comes on. However, loss of the brown/green from dynamo to control box might, as the bulb is driven from the brown/yellow.

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Yeah the light will stay on if either of the connections on the dynamo are loose or disconnected.

@D412REN, there should be two cables attached to the rear of the dynamo: a brown&yellow cable at the top plus a brown&green smaller one lower down. Check they are both present and tight on the terminals. Sometimes the spade connectors get loose and need squashing tighter.

If they're both there and connected up, you've either got an issue with the control box (black plastic rectangle thing on bulkhead) or the dynamo.

I'd look at the dynamo first. You'll probably have to remove it to see, but have a look down the rear end of it and see if you can see two black carbon squares (brushes) held in by springs, either side pressing against the copper armature (which spins around). These wear out and stop making contact with the armature, and it's also possible that they are present but the springs aren't located correctly or that the wires have chafed and broken. I'll dig my spare dynamo out and take a photo, which will hopefully be clearer than this explanation...!

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1 hour ago, PeteStupps said:

Yeah the light will stay on if either of the connections on the dynamo are loose or disconnected.

@D412REN, there should be two cables attached to the rear of the dynamo: a brown&yellow cable at the top plus a brown&green smaller one lower down. Check they are both present and tight on the terminals. Sometimes the spade connectors get loose and need squashing tighter.

If they're both there and connected up, you've either got an issue with the control box (black plastic rectangle thing on bulkhead) or the dynamo.

I'd look at the dynamo first. You'll probably have to remove it to see, but have a look down the rear end of it and see if you can see two black carbon squares (brushes) held in by springs, either side pressing against the copper armature (which spins around). These wear out and stop making contact with the armature, and it's also possible that they are present but the springs aren't located correctly or that the wires have chafed and broken. I'll dig my spare dynamo out and take a photo, which will hopefully be clearer than this explanation...!

Yes I have the thick brown and yellow plus a small brown and yellow underneath I have put brass connectors back on with rubber boots. 
the dynamo is brand new. 
so I’ve ordered a new voltage regulator. 
when I removed the top today the valve to the right 

if I push it down the light goes off. 
but then comes back straight away. 
thanks for the info 

Darren. 

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