Would be grateful if anyone could confirm that my alternator has failed, please?
The car is a Series 2, 1977.
Switched the motor off and removed the keys and the ignition warning light came on. Re-inserted the keys and turned the switch to “ign” position and the light went out. Started the motor and the light stayed off.
Tested the voltage at the battery with the engine running and got a reading of 12.7V. Reading of 12.5V with the engine off.
With the engine off and no keys in the ignition switch I disconnected the small D+ wire from the back of the alternator and the light goes out.
Seems to me the diode pack is faulty so the choice is to buy a new one outright and see if I can get the original one repaired and keep it as a spare. Thinking that the ones that are available now are not such good quality?
Appreciate any thoughts.