The alternator is a Bosch 115 amp unit off of a late 80's model SAAB. It bolted right up. However, it is not just the battery light that is staying on. There is also the brake light and a few of the accessories, but not all.

Also, when the car starts, everything is working normally. But when I turn off the engine and remove the key, the indicator lights come on and the aux fan will keep running as well (if the engine is warm enough).

Thanks for your help. I will check the alternator and make sure the voltage is correct. KRW

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1991 350SDL 350k+ miles