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Thread: Updating with LED rear lights?

  1. #11
    Senior Member Peterv's Avatar
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    I had bought a left taillight to start with from a scrapyard for a good price as it had some scratches but they forgot to tell me about the crack!
    This light came from a 2013 with only 23000km on the clock. They have a set from a 2010 but it has 100000km on the clock and am a little concerned how long they will last before leds will start to fail.
    Got a full refund so will continue searching and fill up the lighting fund.
    There is no substitute for cubic inches!

    Jaguar XK 4.2 2006

  2. #12
    Senior Member Jimbov8's Avatar
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    A new tail light from Jaguar is £200 and the fog/reverse light £100. Why buy scrap?
    Jim.
    2012 XKR Black pack, Speed Pack, Aero pack, Rat pack. Past:-87'XJS 3.6L, 93'XJ40 3.2L gold, 95'XJ6 4.0L sport, 00'XJ8 3.2L sport, 2005 XK8 4.2L coupe, 2009 XK 5.0L Portfolio in that order and enjoyed all of 'em.

    I do not offer advice, I only say what I would do with the set of circumstances presented. Your choice always.

  3. #13
    Senior Member Peterv's Avatar
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    Quote Originally Posted by Jimbov8 View Post
    A new tail light from Jaguar is £200 and the fog/reverse light £100. Why buy scrap?
    Thanks but with VAT and shipping it's a little to pricey for my budget.
    There is no substitute for cubic inches!

    Jaguar XK 4.2 2006

  4. #14
    Senior Member Shmee's Avatar
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    Why bother when CREE Canbus compatible replacement bulbs are available?
    2007 XKR Convertible , Zircon Blue, Ivory leather.

  5. #15
    Senior Member Peterv's Avatar
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    Quote Originally Posted by Shmee View Post
    Why bother when CREE Canbus compatible replacement bulbs are available?
    I don't want led lights in my old units, that's pointless. I like the look of the OEM rear led lights that came 2010.
    There is no substitute for cubic inches!

    Jaguar XK 4.2 2006

  6. #16
    Senior Member Peterv's Avatar
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    Have bought a complete set from a 2010 for £245!
    I hope there are no cracks in them and that all leds work, will see when they arrive!
    There is no substitute for cubic inches!

    Jaguar XK 4.2 2006

  7. #17
    Super Moderator Ian D's Avatar
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    Have fun doing a spot of re-wiring and soldering in resistors to get them working. Nice price though that.
    Current Car:
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  8. #18
    Senior Member Peterv's Avatar
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    Quote Originally Posted by Ian D View Post
    Have fun doing a spot of re-wiring and soldering in resistors to get them working. Nice price though that.
    It will be worth it when I'm done!
    There is no substitute for cubic inches!

    Jaguar XK 4.2 2006

  9. #19
    Senior Member Peterv's Avatar
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    Bought 2010 taillights and wanted to test them on the bench but can't get them to lid up, now I'm afraid if i've ruined them by putting voltage on the wrong pins!?I thought LED's don't break by reversing positive and negative? I looked at George Kale's installation PDF and thought pin 3 on the taillight connector is ground, the only LED's that lid up were the turnsignal but very weak, you could hardly see them lid up. Battery I used was on a maintainer and had 12.6v.
    I had bought a taillight from a 2013 previously and tested it the same way what I remember and they lid up but returned it as there was a crack in the plasic.

    On the connector of the taillight pin 1 is blank and I figured 3 is ground? Am I doing something wrong or have I ruined them?

    Click image for larger version. 

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    There is no substitute for cubic inches!

    Jaguar XK 4.2 2006

  10. #20
    Member Patrick Wong's Avatar
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    Quote Originally Posted by Peterv View Post
    ...I thought LED's don't break by reversing positive and negative?
    This is not correct. If you reverse the voltage polarity, you will end up with an DED (dark-emitting diode) instead of an LED.

    "As with all diodes, current flows easily from p-type to n-type material.[164] However, no current flows and no light is emitted if a small voltage is applied in the reverse direction. If the reverse voltage grows large enough to exceed the breakdown voltage, a large current flows and the LED may be damaged."
    https://en.wikipedia.org/wiki/Light-emitting_diode#Electrical_polarity
    2007 X150 4.2 coupe, Radiance, 19" Carelias
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