On My V8 3.9i Disco 1
Found that when I had alot of electrics on, the abs light would come on and stereo would switch off and back on again.
Checked the Battery and it is fine 12.4 Volts. Charge Fuse is ok.
But when engine running battery voltage went down to 11.6 volts
Suspect Alternator! Fitted a new one. Ran engine and voltage was the same, left vehicle idling and charge rose to 13.1 volts.
I then noticed some smoke coming from new alternator pulley area. When I switched off and checked it, it was F**king boiling hot!
To try and prevent any serious damage to it I put the old one back on!
Vehicle still runs and runs at about 12.6 volts, starts ok in morning too!
If I Charge my spare Battery up overnight to 12.5 volts and fit it there is no voltage drop (to rule out a heavy voltage draw.) then switch on the reading out of the alternator is 13.8 volts idle but only 13.9 at 3000rpm
The battery will eventually lose power again, down to 11.6 volts
Can anyone shine a very bright torch on this problem.
