Thanks for that I took the Alternator to an auto electrician he said the diodes were ok and said if its in the reg cheaper to buy a new one. This is the one that failed from my earlier D3 that was supposedly fixed. The guy who put in my last alternator in under warranty said he would get it fixed for me charged me $100 when I showed the alternator to the auto electrician he said it had the original diodes in and he would have charged more than that. So I guess I was stung. When I put it in and started the car I checked the battery voltage and it was 11.5volts and dropping race to turn off the car and saw the battery light on. So this one was never fixed. I have being carting this around in my caravan for a few years as a spare little did I no. So I had to pull it back out buy a new one and install the new one. You put your faith in some people but some times they shxx on you. Anyway took the car for another 100k trip today and running perfect. So I recon I have fixed my problem