[Mgb-v8] Alternator Questions

[Paul Hunt]

You can forget fuel at this stage, the voltages at the fusebox indicate it is
not charging, so you are running out of sparks, not fuel.  The voltages at the
coil should be ignored as they vary according to what type of ignition system
and coil is fitted.  The voltage at the alternator indicates it isn't even
connected, if there were an internal problem you should at least see battery
voltage there.  Does the ignition warning light glow when you turn on the
ignition?  If you read that voltage with the engine stopped then it could just
be the heavy gauge output wire disconnected between there and the battery
cable stud at the solenoid.  Measure it again with the engine running, and the
voltage on the smaller brown/yellow wire at the alternator.  If you see 0v or
14.5v on both then both wires are disconnected, and possibly the alternator is
faulty if you see 0v.  If you see 14.5v on the output wire but battery voltage
on the brown/yellow then just the output wire is disconnected and the
alternator itself looks to be OK.  Remember a wire can be electrically
disconnected due to corrosion even though it is physically connected, so
remove the connections at both alternator and solenoid and clean them up
before reassembling with Waxoyl or copper grease.

PaulH.
  ----- Original Message -----
  I have suspicion that my alternator may not be charging as it should.