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giarcg giarcg is offline
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Join Date: Jun 2003
Location: Central NC
Posts: 254
The battery light illuminates when alternator output is less than battery voltage... so yes, you can assume the alt or voltage regulator is inop if the light comes on while the engine is running.

I believe there are at least two unused light locations on the stock dash which could be used. BMW uses an amber or yellow light on the LT and GT to indicate the cruise is active but, obviously, color is your preference.

For simplicity I use a small amber LED on the RT placed deep down under the dash. Not obvious when not illuminated but shows up well when lit.
Old 06-13-2019, 07:16 AM
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