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Thread: Best Ignition Live Wire

  1. 28th November 2011, 10:25 AM #1
    CraigE's Avatar
    CraigE
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    Best Ignition Live Wire

    Have just fitted twin thermo fans to the Defender. Currently I have the thermal switch hooked up to accessory ignition wire and runs fine, but means the fans will stay on when accessories switch is on until the temp cools below the set point. Does anyone know of a good full ignition source wire that could be used either under the bonnet or in cab?
    Cheers
    CraigE
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  2. 28th November 2011, 10:50 AM #2
    Tombie Guest
    Not a bad idea to let it run on after...

    Helps prevent after boil
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  3. 28th November 2011, 11:38 AM #3
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    Quote Originally Posted by Tombie View Post
    Not a bad idea to let it run on after...

    Helps prevent after boil
    Problem is without an electric water pump your only cooling whats in the radiator arent you?

    I have persevered with my thermos on an ignition wire.
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  4. 28th November 2011, 04:48 PM #4
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    northiam
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    The connection on the alternator to the ign light on the dash is ideal. The ign light is illuminated when no voltage is present, as the ign lamp is earthed via this connection. When the alt produces voltage at this terminal the light ceases, this terminal is now 12 volt which you can energize a small relay. This relay can in turn switch another relay for one or 2 fans or your thermo switch.
    This way the fans cannot run or start until the engine is running.
    This works I have used this method many times, just not on a LR
    Glenn
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  5. 29th November 2011, 07:21 AM #5
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    CraigE
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    Quote Originally Posted by stuee View Post
    Problem is without an electric water pump your only cooling whats in the radiator arent you?

    I have persevered with my thermos on an ignition wire.
    That was my thoughts, not a lot of benefit in running it after the engine is shut off.
    But hey if there is some benefit I may be converted.
    2011 Discovery 4 TDV6
    2009 DRZ400E Suzuki
    1956 & 1961 P4 Rover (project)
    1976 SS Torana (project - all cash donations or parts accepted)
    2003 WK Holden Statesman
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    2000 Defender Extreme: Shrek (but only to son)
    84 RR (Gone) 97 Tdi Disco (Gone)
    98 Ducati 900SS Gone & Missed

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