Hi guys, 

 

I had an issue with the aux belt tensioner failing repeatedly. Only thing that cured it was changing the alternator so can only assume it was periodically jamming and causing enough instant tension to snap the tensioner.

 

Anyway, with that resolved I now have another issue. The new alternator won’t charge until I rev it to 2500rpm. Once I’ve revved it, that’s it it’s charging until I turn the engine off. I’ve a cigarette lighter phone charger that shows the voltage. It circa 12.9v until I rev it then it’s around 14v.

 

The alternator is a recon and I had no such issues previously so I’ve been nagging the reconditioners to replace it but tonight I did some googling and I’m now wondering if there may be another issue here so looking for advice/help.

 

i just popped the key in the ignition and noted I have no battery light! I’d never even noticed this. I read up about the alternator needing to get excited to kick in and the wire that does this also gives the dash battery light..... is that correct, and if so what colour wire is it?

 

thanks in advance.

 

oh, if anyone reading this, remember my issues with the passenger side window and mirrors adjuster..... well it just started being less of a problem then fixed itself of its own accord. Also the dash not clearing the inspection messages or letting me zero the trip or change the clock, that became less of an issue then cured itself too!

 

#fabiagremlins

Edited 15 April, 20215 yr by capriman

This is usually a symptom of the common broken alternator wires at the plug connectors underneath near the gearbox. The blue wire is the exciter wire that is responsible for the ignition light and correct alternator start-up. Have a look to see if any of the four wires are broken.

 

Looks something like this....

 

Edited 15 April, 20215 yr by TMB