Started driving the '87 325is DD/Track car the other day after it had been sitting for several months. Battery was dead, so I charged it up for a while and it started right up and ran fine- but the charge light was on unless I revved the engine up to ~2500 rpm, then the light would *almost* go out.
I checked the alternator output and it was only like 11.5v, so I swapped the alternator for another one from a parts car. The output from the "new" alternator is now ~13.8v, but the dash lights are still on (battery, parking brake and brake light) until I rev the engine.
Anyone had a similar problem? I'm thinking it's a bad diode in the alternator?
Bret
I checked the alternator output and it was only like 11.5v, so I swapped the alternator for another one from a parts car. The output from the "new" alternator is now ~13.8v, but the dash lights are still on (battery, parking brake and brake light) until I rev the engine.
Anyone had a similar problem? I'm thinking it's a bad diode in the alternator?
Bret
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