What is the brown wire coming off the alternator on a 88 Cadillac brougham?

The brown wire coming off the alternator on a 1988 Cadillac Brougham is typically associated with the voltage regulator or the alternator's sensing circuit. It helps monitor the output voltage and ensure proper charging of the battery. If you're experiencing electrical issues, it’s crucial to check the condition of this wire and its connections, as a faulty connection can lead to charging problems. Always refer to the vehicle's service manual for specific wiring diagrams and information.