I have spent some time changing my alternator on my 1998 Renault Megane scenic 1.6 Alize
with air-con. If you have done this you will know it is a right pain!
I have now realise that the alternator is not the same. The original had 2 wires (B+ and L) and the new one has three ( B+, + and L).:loser:
Connecting 'L' and 'B+' (as original) results in no addtional voltage than the charged battery provides and the battery light stays on.
With research I believe that the '+' has something to do with voltage sensing and I have found if I short the new terminal '+' with 'B+' it will kick out 14V ish and the battery light goes out. However, in doing so it seems very strained and it whines a lot. I guess that it needs to sense a voltage from elsewhere. The haynes manual suggests a yellow wire but there was no such wire in sight.
1) scrap car?
2) connect B+ to somewhere / somewhere else?
3) spend more time and money on fitting another two wire alternator.
Your help would be very very much appreciated.