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ginjez

Member Since: 18 Sep 2011
Location: huddersfield
Posts: 1749

2011 Defender 90 Puma 2.4 ST Santorini Black

courtesy light

I've got no interior courtesy lights working on the recently aquired 50th. There's no alarm on Japanese 50th but I think the 10as green box is behind instrument binacle. Ive taken out the front light and established I've got 12v to the purple/white wire and earth but nothing to purple wire and earth. Plugging switch back in I've nothing across the bulb.

Any help appreciated as both front and rear aren't working.

24th Oct 2021 4:38pm

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 1729

FYI.
The 10AS or ALM module can be seen if you remove the drivers footwell speaker and look upwards. Green if 10 AS, black if ALM.

https://blackbox-solutions.com/help/SM031.html

24th Oct 2021 5:29pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3178

2012 Defender 90 Puma 2.2 CSW Santorini Black

Would it still be visible with the ac unit? 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

24th Oct 2021 5:32pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3178

Re: courtesy light

ginjez wrote:
I've got no interior courtesy lights working on the recently aquired 50th. There's no alarm on Japanese 50th but I think the 10as green box is behind instrument binacle. Ive taken out the front light and established I've got 12v to the purple/white wire and earth but nothing to purple wire and earth. Plugging switch back in I've nothing across the bulb.

Any help appreciated as both front and rear aren't working.

I am not familiar with 1998 era models.. but later models, the Purple/White is coming from the 10AS, and the solid Purple is fused directly from the battery. Earth is going to a ground, somewhere.

You say "got 12v to the purple/white wire and earth"... given that you have 12V on the earth black wire, then you have a broken earth. You should measure 0V on the black wire (so you actually get 12V across the bulb. Perhaps you can test a piece of extra wire, connect it on black and ground it somwhere. By the sound of it, that should power up the interior light when any door is open or you unlock the Defender.

The solid Purple wire should always have 12V on it.. so that you can switch on the interior light anytime you wish. This should be fused, check the fuses on the transmission tunnel. Sorry, I do not know which one would that be, but usually there is a label, and should indicate which one is for the interior light.

Hope this helps somehow. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

24th Oct 2021 5:43pm

ginjez

Member Since: 18 Sep 2011
Location: huddersfield
Posts: 1749

ok, I miay not have explained correctly. To simplify I have got 12v to purple/white. Anyone know which fuse it is to interior light. I'm not the best at Japanese

24th Oct 2021 5:54pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

fuse 30 main fuse box or ヒューズ30メインヒューズボックス

24th Oct 2021 7:08pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3178

Can perhaps look for this symbol?

1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

24th Oct 2021 8:03pm

Procta

Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4931

Re: courtesy light

ginjez wrote:
I've got no interior courtesy lights working on the recently aquired 50th. There's no alarm on Japanese 50th but I think the 10as green box is behind instrument binacle. Ive taken out the front light and established I've got 12v to the purple/white wire and earth but nothing to purple wire and earth. Plugging switch back in I've nothing across the bulb.

Any help appreciated as both front and rear aren't working.

check the connector in the roof headlining, it will be a little further back from the light somewhere, its like a five pin connector. ( that also bridges the rear light i believe) That could be rotten, It happened on my 300 Tdi, we could not work out why we were getting power to the driver side window screen post, but not further up to the light. after i had a feel around, i found a connector that was rotten, We cut the connector off, ( not really my idea) My dad made another loom up and it was working.
So it may need a bit of a clean, i think you can get a replacement loom too. I have a spare rear one in storage Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!

30th Oct 2021 2:18am

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