Hello;
Problem with a 1964 230SL
The alternator light is on at all times with the ignition off. When key is turned to run and also to start, the light goes off and remains off when engine is running. I had checked the charging system and it wasn't charging. I removed alternator and found bad diodes. I was unable to find parts locally so I replaced the alternator with a remanufactured 35 amp alternator. After reinstalling the alternator, the results are the same but it now charges right where it should be 14.5 volts. I also replaced the regulator with a electronic unit but tried it with the original one as well. Results were the same, light on with ign off, on when ign. switched on or started. Any help would be appreciated. Additional note; all the engine wiring is pretty crusty and painted over, but appears to be otherwise ok.
Any help is appreciated.