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rizga1



Member Since: 14 Apr 2020
Location: QZ
Posts: 28
 
Interior lights only work manually not in 'auto'
I am hoping this turns out to be a stupid question - so it is an easy fix Very Happy

Both interior lights in my 110 utility only work if I switch them on manually. If I leave them in the auto position then they do not come on when a door is opened.

Logic suggests that it cannot be the fuse because they work manually and I am guessing that all of the door switches cannot be faulty (I could understand if it was one of them).

Does anyone have any suggestion as to what this could be please?

Thank you very much inadvance.

If I am being dumb then I look forward to the Censored -taking of course Rolling with laughter
Post #828408 29th Apr 2020 9:03am
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Bluericky



Member Since: 26 Jun 2014
Location: Cornwall
Posts: 647
United Kingdom 2009 Defender 110 Puma 2.4 DCPU Keswick Green
It will probably be your door switches have either broken or corroded through . Open your door and give the little button a wriggle , it may need pulling out if it’s been distorted . If the lights come on , then that’s your problem, relatively easy fix ! https://www.instagram.com/hustynminepark/
Post #828410 29th Apr 2020 9:13am
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6482
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
The alarm ECU receives the door switch inputs and switches a 12V ground feed to the interior light(s) when a door is opened.

There are two door switch inputs to the ECU: one for the driver's door and one for all the other doors in parallel

Unlikely all the door switches are faulty but you never know Laughing

Check Fuses 6 and 7 which are the supply to the alarm ECU.

Edit: stupid boy Embarassed  1988 90 Td5 NAS soft top
2015 D90 XS SW

Last edited by Martin on 29th Apr 2020 11:59am. Edited 1 time in total
Post #828424 29th Apr 2020 10:02am
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Peregrine_White



Member Since: 05 Feb 2019
Location: North West
Posts: 68
United Kingdom 2008 Defender 90 Puma 2.4 SW Keswick Green
as above check the fuses and the door switches first. I had the exact same symptoms as you have mentioned, changed the fuses and checked the door pins and both were fine however the light would still not function in the auto setting, I took the off chance that it was the light that was faulty and purchased an Mud LED one and that fixed the problem so in my case the unit itself was broken. Just something worth considering after you have tried the usual culprits.
Post #828425 29th Apr 2020 10:16am
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dgardel



Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586
Italy 
door switch inputs are "to ground" when doors open Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License
Post #828426 29th Apr 2020 10:31am
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rizga1



Member Since: 14 Apr 2020
Location: QZ
Posts: 28
 
Thanks everyone.

The door switches seem to wiggle fine and look to be in perfect condition.

I have not checked those fuses yet but I will do so. The alarm should be OK though because the little red LED in the dash flashes as per the owners manual.

I would not think both light units would be faulty.

Thanks again.
Post #828427 29th Apr 2020 10:39am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
The alarm ECU transistor output for interior light auto the output grounds pin 1 Gray connector
Post #828437 29th Apr 2020 11:30am
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6482
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
Corrected my post above Embarassed Embarassed  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #828444 29th Apr 2020 11:59am
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rizga1



Member Since: 14 Apr 2020
Location: QZ
Posts: 28
 
Something else has just occured to me, aren't the indicators supposed to flash 3 times when you lock the car?

Mine don't so maybe the alarm has got an issue.

Anyway I will check fuses 6 and 7 as soon as I get a chance.
Post #828447 29th Apr 2020 12:15pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
indicators supposed to flash 3 times when you lock the car


key fob battery low
Post #828451 29th Apr 2020 12:23pm
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rizga1



Member Since: 14 Apr 2020
Location: QZ
Posts: 28
 
Oh right, will change them out. Thanks.
Post #828453 29th Apr 2020 12:34pm
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