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Dead Parrot · 06-22-2020, 08:36 AM

Type of Alt? If one of the 10/12SI internal regulated models, unplug and replug the two wire plug at the Alt. The brown wire is the excite wire and needs to have voltage from somewhere to start the Alt once things start spinning. On an idiot light setup, it gets the kick start voltage via the Gen/Alt bulb. On a gauge cluster, IIRC, there is a resistance wire that serves the same purpose.

06-22-2020, 08:36 AM	#3
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,663	Re: Heater core change. Now no charge Type of Alt? If one of the 10/12SI internal regulated models, unplug and replug the two wire plug at the Alt. The brown wire is the excite wire and needs to have voltage from somewhere to start the Alt once things start spinning. On an idiot light setup, it gets the kick start voltage via the Gen/Alt bulb. On a gauge cluster, IIRC, there is a resistance wire that serves the same purpose.