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budvar 07-27-2013 08:05 PM

Polarity of LED lights
 
Hi all,

Just rewired the mast. Changed all lights to LED's. On the instructions, and in "This Old Boat", they mention making sure the polarity is correct when wiring. I do have a new digital multimeter. However, when checking, I don't notice any difference when reversing the meter prongs to the red and black wires of the new lights. Supposedly, you get a (minus) - if it's backwards. Should I just go ahead and connect the lights, red/hot, black/ground and try them briefly (the mast will be down). Expensive lights, don't want to burn them out needlessly.

Thanks!

Chris
Pasco, Wa.

artbyjody 07-27-2013 08:28 PM

Re: Polarity of LED lights
 
You'll be fine - just connect and go.:)

jimkyle99 07-27-2013 08:31 PM

Re: Polarity of LED lights
 
They should be diode protected against a reverse voltage any way but yes, red = hot (+), black = ground (-)

fryewe 07-27-2013 09:43 PM

Re: Polarity of LED lights
 
Quote:

Originally Posted by budvar (Post 1065483)
However, when checking, I don't notice any difference when reversing the meter prongs to the red and black wires of the new lights. Supposedly, you get a (minus) - if it's backwards. Should I just go ahead and connect the lights, red/hot, black/ground and try them briefly (the mast will be down). Expensive lights, don't want to burn them out needlessly.

Chris:

You can't hurt the lights by wiring them backwards but if they aren't connected with the right polarity they won't work.

Apply 12V to the lights and see if they do. If they do note the polarity of the voltage. If not reverse the polarity of the voltage. Mark the wires. Then make sure the polarity is the same when you raise the mast.

Omatako 07-28-2013 01:12 AM

Re: Polarity of LED lights
 
Quote:

Originally Posted by jimkyle99 (Post 1065502)
They should be diode protected against a reverse voltage any way but yes, red = hot (+), black = ground (-)

They aren't "diode protected" - they are diodes :):)


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