Dashboard Lighting
#21
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LEDs are indeed polarity sensitive. That's the nature (and generally the purpose) of a diode - to pass current in only one direction. The polarity is indicated by the length of the leads. The longer one is the anode or positive lead or in some cases it's indicated by a flat side for the negative or cathode on the base of a round LED. Here's a link to more than you ever wanted to know about LEDs:
http://www.kpsec.freeuk.com/components/led.htm
http://www.kpsec.freeuk.com/components/led.htm
Yep, but these bulbs are most likely designed so they are not polarity sensitive. They probably have two LEDs in the case and one is wired backwards from the other. That way you can insert it in either direction and it will still work. The look exactly like a regular 194 bulb, except they are LEDs rather than incandescent. Normal 194's aren't polarity sensitive, and there is no marking on the bulb or on the socket to indicate polarity. My guess is that one of the LEDs in my one bulb doesn't work. That's why it started working when I flipped it around. If the assembly was polarity sensitive there would be some kind of marking on it.
#23
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Now I'm starting to wonder if I could change out all of the bulbs to get that color. The climate control and audio lights have that light green tint. I'd like everything to match. Can those lights be changed, too?
#24
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rsa760041
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
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09-25-2015 01:33 PM
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