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gramgramfirey

New Member

• Jul 23, 2011

• #1

300 Tdi.
Alternator light glows slightly and dims as revs increase. Also light stays on after starting. Give a rev and she goes out.
Question: Is the regulator stuffed or do I need to have the unit recoed?
Any suggestions. Thanks.
:behindsofa:

 

Station House

Well-Known Member

• Jul 23, 2011

• #2

Assuming fan belt not slipping, then sounds like the alternator diode is on the way out.

Don't know if you can recon yourself (sure others will) or whether it's a swap out

 

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gramgramfirey

New Member

• Jul 23, 2011

• #3

Thanks Station House. I recoed it some years ago, thought it was about ready to do again. Might even upgrade to a 100 amp model. Thanks for that confirmation of what I thought was wrong.
Cheers.:beer2:

 

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andy mcd

Active Member

• Jul 29, 2011

• #4

sounds like maybe the didoes are on there way out, or maybe the rectifier best check with a multimeter. I have had an alternator pumping out just over 14volts but the warnign light still glowed. It was a fault diode i just replaced with a OE alternator for about £100

 

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gramgramfirey

New Member

• Jul 30, 2011

• #5

Thanks Andy, I`ll think that is the way to go and much less mucking about!
Might even upgrade to a 100 Amp model.

 

mundungus

Active Member

• Jul 30, 2011

• #6

Mine has that second symptom of staying on sometimes after starting until i increase the revs slightly. But once the revs increase it goes out and stays out even if the revs drop back down. I don't think it's causing me any problems.

It doesn't glow otherwise though.

 

natas

Well-Known Member

• Jul 30, 2011

• #7

mundungus said:

Mine has that second symptom of staying on sometimes after starting until i increase the revs slightly. But once the revs increase it goes out and stays out even if the revs drop back down. I don't think it's causing me any problems.

It doesn't glow otherwise though.

Click to expand...

Mine also.

Bin doing it since I got her, no problems with the battery yet.

As soon as I give her a rev, light goes out and stays out.............

 

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andy mcd

Active Member

• Jul 30, 2011

• #8

I t is normall to have to give a diesel a slight rev to get the warnign light out. All it is doing is exciting the alternator and making it produce its on electricity instead of drawing from the battery

 

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Sean

Banned

• Jul 30, 2011

• #9

check yer tick over speed