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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3674

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Interior light staying on
Interior light seems to be staying on intermittently. I’ve check the door switches and they are all functioning correctly. They are all wired back to the ecu, I’m guessing as they are part of the alarm system. What else should I be checking? The lights turn off if set to off, but stay on when in auto.
Thanks
Col
Post #734491 13th Oct 2018 10:22am
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BenB8man



Member Since: 22 Mar 2017
Location: Norfolk
Posts: 429

United Kingdom 2010 Defender 110 Puma 2.4 DCPU Stornoway Grey
If you're sure the door switches are ok, the only other switch I can think of is on the light itself.

You'll find that you have a red light on your rev counter if one of the door switches is showing open too, worth looking out for.
Post #734534 13th Oct 2018 4:02pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3674

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Checked them both at the switch and that way: red light flashjng when doors open, goes off when closed.
Post #734541 13th Oct 2018 5:34pm
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barbel jim



Member Since: 12 Dec 2012
Location: Northants
Posts: 1423

United Kingdom 2005 Defender 90 Td5 HT Tonga Green
Mine was water ingress Rolling Eyes

It wouldn't always lock or alarm either
Post #734547 13th Oct 2018 5:55pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3674

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
That’s what I suspect as it happens after rain! The door switches were bone dry when I checked today and it had been Censored down all morning!
Post #734556 13th Oct 2018 6:13pm
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KelvinB



Member Since: 17 May 2018
Location: Crickhowell
Posts: 24

Wales 2008 Defender 110 Puma 2.4 CSW Stornoway Grey
barbel jim wrote:
Mine was water ingress Rolling Eyes

It wouldn't always lock or alarm either


I had the same problem just a few days ago - When locking with the remote, it would lock and then unlock again as it thought one of the doors was still open.

Just pushed each door sensor a few times and it's been ok since.
Post #734566 13th Oct 2018 7:12pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3674

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Still struggling with this. Checked the door switches and I’m confident it isn’t them, for starters the alarm doesn’t sound andit would if the door switches were made. Have checked the light units themselves and all appears ok. Havigflowed the wiring diagram, the light is switched at the ecu, so maybe an issue here? Any thoughts or anything else to check?

Col
Post #739629 10th Nov 2018 9:41am
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Clive



Member Since: 21 Mar 2014
Location: Littleborough
Posts: 467

United Kingdom 2004 Defender 90 Td5 X-Tech LE Zambezi Silver
The door switches are only switching a very low current input to the alarm ECU and not the power to the lights directly, I just measured it on mine and it's less than 8mA, at this current level, it's quite feasible that a bit of moisture in one of the pin switches, or in the wiring in the door pillars or roof could cause it, don't forget the one on the back door too.
Post #739646 10th Nov 2018 11:38am
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3674

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
If it was the door switch, would that not trigger the alarm to go off?
Post #739648 10th Nov 2018 11:48am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20348

United Kingdom 
What light fixture is in place the standard incandescent bulb or LED? $W33T $0U7H3RN $UG4R
🇬🇧🏴󠁧󠁢󠁥󠁮󠁧󠁿🏴󠁧󠁢󠁷󠁬󠁳󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🇮🇪🇺🇸⛽️🛢️⚙️🧰💪
Post #739661 10th Nov 2018 12:50pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3674

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
All standard.
Post #739664 10th Nov 2018 12:58pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20348

United Kingdom 
Don't forget the bonnet switch as well.

It does seem to be a form of Earth leakage, as they are Earth switched there is a ground path being established and likely via moisture as suggested.

Try pushing in the sensors then quickly releasing them to spring back, they can also tend to get gummed up in damp weather. $W33T $0U7H3RN $UG4R
🇬🇧🏴󠁧󠁢󠁥󠁮󠁧󠁿🏴󠁧󠁢󠁷󠁬󠁳󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🇮🇪🇺🇸⛽️🛢️⚙️🧰💪
Post #739666 10th Nov 2018 1:04pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3674

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
After this went away and came back a few times, I went over a bump and the lights came on. I gave the front light a knock and it went off again, took the cover off and it was full of cobwebs and dead insects!! Cleaned them out an hey pesto! All good! Who knew!!?
Post #742131 25th Nov 2018 11:32am
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pme



Member Since: 06 Jan 2016
Location: cambridge and mainly ariege
Posts: 49

United Kingdom 2007 Defender 90 Puma 2.4 SW Tonga Green
this may work for you, it fixed mine
agentmulder wrote:
Careful that the piece pictured here (or similar) hasn't bent upwards and caused a short to the 10AS telling it you want the courtesy lights on permanently:


Click image to enlarge
Post #742515 27th Nov 2018 2:48pm
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