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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Aug 2019 Posts: 242 'Bolter | | 'Bolter Joined: Aug 2019 Posts: 242 | I also had this problem.
It seems the regulators on many alternators are configured to control an incandescent bulb rather than an LED.
They raise the voltage on one side of the bulb, but not enough to turn off an LED which will still illuminate under a small voltage difference.
I bet if you swap in an incandescent it will be fine.
'59 Chevy Suburban, NAPCO
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