Dragster Posted December 15, 2016 Share Posted December 15, 2016 I have a Pathfinder SE that I wanted replace the fog lights with a pair of LED units. problem is they won't work when wired to the current setup? put the old ones back and they work. as many folks know the fogs are wired with the headlight low beams thru the relay. could this be limiting the current to the LEDs. I may just run a seperate line from the factory fog light switch, all suggestions welcomed. Link to comment Share on other sites More sharing options...
k9sar Posted December 15, 2016 Share Posted December 15, 2016 check your polarity. LEDs are very particular about which direction the current flows 1 Link to comment Share on other sites More sharing options...
MrFML Posted December 16, 2016 Share Posted December 16, 2016 They may also require their own ground. Link to comment Share on other sites More sharing options...
Slartibartfast Posted December 16, 2016 Share Posted December 16, 2016 If the halogens work, you have power and ground to the socket. No need to screw with the circuit. LEDs shouldn't draw more power than the halogens that were there. Like K9SAR said, you've probably got the bulbs in backwards. If you want to test the LEDs, take a couple of jumper leads (or wire scraps, whatever) and test the bulb straight from the battery. If it doesn't light, reverse polarity. If it still doesn't light, there's something wrong with the bulb. If the bulb does light, try it in the fog socket again, see if it works, turn it around if it doesn't. Link to comment Share on other sites More sharing options...
EnviroBrad Posted December 16, 2016 Share Posted December 16, 2016 Thanks guys i have even learnt somthing. Happy holidays every one Sent from my SM-N920C using Tapatalk Link to comment Share on other sites More sharing options...
Charlie_Brown Posted December 19, 2016 Share Posted December 19, 2016 I second the ground, a halogen can run without however a lot of LEDS are sensitive to this and will either flicker, be dim or in rare cases just refuse to work. Link to comment Share on other sites More sharing options...
Slartibartfast Posted December 20, 2016 Share Posted December 20, 2016 Any bulb needs + and -, no matter the type. You do notice flickering more with LEDs than with incandescents. This is because an incandescent light has a hot filament inside that takes a second to cool down and quit glowing after power is cut. Interrupt the power for a fraction of a second and you probably won't notice. Cut the power on an LED and it goes dark instantly. Link to comment Share on other sites More sharing options...
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