LED rear signal bulbs

[ChrisZang]

Originally Posted by Stroked & Blown

Try reversing the polarity (put the bulb in the other way) if you haven't already.

That is really HARD to do with the signal bulbs, it's about the same as trying to reverse polarity on a standard screw in light bulb

[DamageINC123]

One other thing to look out for when switching tail lights to LED. When I switched to the DEPO with LED tail lights that plug into the old bulb sockets my cruise control quite working. I had to go to the auto parts store and by a small light with socket and wire into one of the tail lights to trick the system into thinking a regular bulb was instailed for the cruise control to work. Its actually a bulb and socket made to light up a liscense plate. I hid the bulb behind the carpet in the trunk.
This is on a 1997. I am not sure about other years. You can test it by pulling both bulbs. As longs as one bulb is identified by the computer the cruise will work.

[yimmy149]

Originally Posted by ChrisZang

That is really HARD to do with the signal bulbs, it's about the same as trying to reverse polarity on a standard screw in light bulb

You have to make the change in the wiring harness, it's not about how you install the bulb.

-james

[Aron in Toronto]

Here is a link to a source for LED specific flashers, but you may run into issues if you are only switching to LEDs in the rear and not the front.

http://autolumination.com/equalizers.htm

Google LED turn signal flasher and you will get lots of info.

[ChrisZang]

Originally Posted by yimmy149

You have to make the change in the wiring harness, it's not about how you install the bulb.

-james

I don't think I will change the whole car to positive ground for that.
I'll first go the route of trying an electronic flasher module

[MN 986]

I don't have any experience with them, but during a recent scan of misc. items for a Boxster on eBay I ran across 'LED load equalizers' on eBay from a seller called sportscarextras. I don't know how to ad a link, but current eBay item # is 120526830998.
Maybe worth a look?
Good luck!

[ChrisZang]

Thanks, the stuff that I ordered from v-leds should arrived tpnoight and now I know:
I am now officially an idiot :ah:
The rear signal bulbs have indeed switched polarity - so all the posters who told me to change plus and minus were right and I was wrong

Of course, Porsche doesn't make this easy for you, but your Dremel tool and your soldering iron is your friend

[Stroked & Blown]

For 194 style bulbs (corners) you can just turn them around.

For the turn-in style, I wonder if you can order LED bulbs with reversed polarity..