| [GMCnet] Re: New LED front turn lights not working right... [message #369364 is a reply to message #369363] |
Sat, 02 April 2022 14:51   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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I got an education on polarity when I converted my GMC 78 Royale's
clearance lights on the roof. I bought all new led lights and hooked one of
them up and turned the power on, and nada, nuttin', and scratched my head
and exclaimed Wth!. So, out comes my trusty Fluke 77 and it told me the
story. No rhyme or reason to the wiring. Polarity on all of them was
different. So, turn on the power, check the polarity, hook up the led,
repeat x 10. Same is true throughout the whole 12 volt system in the coach.
Incandescent's don't care about polarity. Led's definitely do. Now I check
first, then proceed.
Jim Hupy
Salem, Oregon
On Sat, Apr 2, 2022, 12:21 PM John R. Lebetski
wrote:
> Bruce that one gets ‘em every time. The GM engineer design parameters
> were not for LEDs at some future date. Right up there with the designed high
> blower over voltage trick by design. Me, I’m fine with incandescent lamps
> in classic vehicles and love the warm look.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
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