Date registered: Nov 2014
Vehicle: 1990 350SDL, "Grandpa's Roadster" Project Car
Location: New Hampshire
Mentioned: 9 Post(s)
Quoted: 792 Post(s)
Most Bosch alternators of the era have what are called exciter diodes that feed the light. [s]I recall they are in the voltage regulator/brush block. Worth trying...[/s] They're in the alternator body itself. It's a common failure. We used to make up a diode pack from 3 1n4004 diodes and replace it without overhauling the whole thing. (on the alternators that were not internally regulated.
"Real engines don't have spark plugs!"
Last edited by John350; 04-13-2019 at 12:08 PM.
Reason: I was wrong...