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  1. With the recent poor weather and my local authority's hit and miss policy of gritting the roads around where I live I decided to fit an outside thermometer to my TD5 Defender 90 XS to help judge how cold conditions are. In previous Defenders I have owned I have tried to do this a number of times, but the thermometer units I bought were really poor quality and inaccurate - I am sure you will have seen these advertised. I also wanted an easy install as my workshop roof is now laying in the next county due to the recent high winds. After the bit of research I found a really good thermometer that is used by people who keep reptiles. You can find it on eBay at this link: http://www.ebay.co.uk/itm/160772214729?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 The unit has an inside/outside functionality as well as relative humidity. It is battery operated (AAA) so no power wiring headaches, but best of all it only costs £9.99! The install was really straight forward and only requires a little bit of fettling to prepare it for your Landy. The temperature probe does not have a very long wire attached to it, but a piece of speaker wire can be attached to ensure correct length (long enough to reach from your dash, down to the footwell and then under your Defender to the inside of the front wing). I tested my connections then soldered and heat shrunk the speaker wire into the circuit. Next I decided the best location for the display unit. I decided to to mount it in the bottom righthand corner of my windscreen and fixed it in position with some double-sided foam sticky tape (you can buy a roll of this stuff off Amazon) - see attached pic. I would recommend that you fix your probe in place first and fit the display unit at the end - it just saves you having to peal off and restick etc... I then ran the probe wire down the side of the dash and then across to the drivers door seal. Because of the size of the wire it will fit inside of the door seal all the way down to the footwell - see attached pic. In the footwell I ran the probe wire out and across to a pre-drilled drain hole - the probe just about fits so I would advise not adding anything to it until you get it in the final mounting position - see attached pic. From here I ran the probe and wire forward to the inside of the front wing. The probe has to be away from the engine as the engine heat will effect the units reading. I toyed with the idea to position the probe under the drivers side, but thought that it would get caked in mud and therefore effect the accuracy of the readings. The final resting place was at the front of the wing away form the headlights - heat issues too. Where I could I zip tied the wire into place. I now have a very simple and effective inside/outside temperature gauge in my Defender that is functioning beautifully. The only downside is that the display unit is not backlit so reading it at night is a little tricky. There are more elegant solutions that are more in keeping with the Defender dash, but these require a lot more work and come in around £70 - £80. If I had the time I would install one of these, but for now I am really happy with my immediate fix. The following link is to one of these more expensive units: http://www.ebay.co.uk/itm/Check-Temp-Time-Internal-External-car-temperature-guage-vehicle-thermometer-/370647874159?pt=UK_In_Car_Technology&hash=item564c55ba6f
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