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-   Porsche 911 Technical Forum (http://forums.pelicanparts.com/porsche-911-technical-forum/)
-   -   Riddle me this: Where is the current coming from? (http://forums.pelicanparts.com/porsche-911-technical-forum/974442-riddle-me-where-current-coming.html)

DaveMcKenz 10-20-2017 09:06 AM
If you search for LED tail lights by a user named Spoke, there is a detailed discussion of this situation. He incorporates a resistor into his LED brake lights to address this problem. An add-on resistor will also solve the problem, and he sells one. Or you can just go back to regular tungsten filament bulbs for the two rear brake lights.
Good luck,
Dave

Tremelune 10-20-2017 09:25 AM
I would think adding a resistor defeats the purpose of LED bulbs (a lower draw on the charging system). I guess it matters how much resistance you need to add...

Here's the Spoke custom LED panel thread: http://forums.pelicanparts.com/porsche-911-technical-forum/854989-led-brake-lights.html

jrbennett 10-21-2017 08:32 PM
Quote:
Originally Posted by nickd (Post 9783414)
I’m not sure what year you have, but the cruise control completes a ground through the brake lights and disengages when it gets +12v from that wire. With all incandescent bulbs, the resistance to ground is 6 ohms. With led/smd bulbs, it's not. ;)
Same thing I was going to say


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