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I have a 2003 1.9 Partner and recently the battery light has started to come on whilst driving (not all the time tho), sometimes it just turns off again but it always turns off when the engine is restarted.

I have checked the voltage whilst idling/revving and all appears ok which leads me to believe the alternator is fine. The van has never had an issue starting tho.

There is a single small wire which goes onto the alternator (guessing for the sensor) and this seemed pretty corroded so replaced the connector but this doesn't seem to have made any difference.

There are a couple of other issues but I not sure if they are related or not, the horn only works with the ignition off and when the battery light comes on the stereo (aftermarket) switches off.

The rest of the electrics appear fine tho!

If anyone has any ideas I would be grateful.
 

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Is the connector at the positive battery post tight, common problem with this style of clip on connector. Check all earths especially engine/gearbox to chassis.

Usually that makes the pixies flow in a straight line:)
 

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Discussion Starter #3
Is the connector at the positive battery post tight, common problem with this style of clip on connector. Check all earths especially engine/gearbox to chassis.

Usually that makes the pixies flow in a straight line:)
I have checked the connector and it appears tight but I have never been a fan of it would much prefer a bolt style!

Where are the main earths located you would advise on checking?
 

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Usually that big earth that goes from negative post to bell housing and from there to chassis. Usually have to remove battery box to get to it.
 

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I have a 2003 1.9 Partner and recently the battery light has started to come on whilst driving (not all the time tho), sometimes it just turns off again but it always turns off when the engine is restarted.

I have checked the voltage whilst idling/revving and all appears ok which leads me to believe the alternator is fine. The van has never had an issue starting tho.

There is a single small wire which goes onto the alternator (guessing for the sensor) and this seemed pretty corroded so replaced the connector but this doesn't seem to have made any difference.

There are a couple of other issues but I not sure if they are related or not, the horn only works with the ignition off and when the battery light comes on the stereo (aftermarket) switches off.

The rest of the electrics appear fine tho!

If anyone has any ideas I would be grateful.
the horn is the steering wheel earth behind the airbag, if you remove airbag and give the earth a good clean and put some grease or Vaseline on the to stop it corroding again
 
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