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replacement LED bulbs-1141
Posted: Tue Apr 29, 2014 9:51 pm
by sirlandsalot
My old RV has nice little LED bulbs installed in all the 12V dome lights. They are a little bit more money but way cheaper than changing the entire dome light to LED. They also work in the tail lights!
I pulled a few out and replaced the 12V bulbs with them in the 12V dome lights in my
....They don't work!
Why would they work on my 12 volt lights in an RV and not on the 12v lights in a mac? let's see somebody answer this one!
Cheers, David
Re: replacement LED bulbs-1141
Posted: Tue Apr 29, 2014 10:48 pm
by jimbo
right way around?
Re: replacement LED bulbs-1141
Posted: Tue Apr 29, 2014 11:58 pm
by Highlander
Reversed Polarity !!
J
Re: replacement LED bulbs-1141
Posted: Wed Apr 30, 2014 5:40 am
by kmclemore
Highlander wrote:Reversed Polarity !!
J
Yep. I don't know why, but the lights in the Mac are always wired backwards from what you'd expect in a car or RV, so although incandescent bulbs work fine, when using LED's you need to reverse the polarity.
Re: replacement LED bulbs-1141
Posted: Wed Apr 30, 2014 5:56 am
by Tony E
Same thing happened to me but yes switch around the wire and "there is light"....
Re: replacement LED bulbs-1141
Posted: Wed Apr 30, 2014 6:42 am
by Russ
As stated, most likely polarity is backwards. Mac workers didn't have to concern themselves with polarity on incandescent bulbs.
I have found some LEDs that work both directions. One is in my anchor light and I had to install an actual Diode to use it in my reverse polarity mast steaming/anchor scheme.
--Russ
Re: replacement LED bulbs-1141
Posted: Wed Apr 30, 2014 2:51 pm
by sirlandsalot
Well! .....you guys sure answer that one easy....had me bafooned! Gotta love this forum.
Happy sailing everyone, tis getting to be the season!
David