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Harry.O



Member Since: 25 Jul 2014
Location: Warwickshire
Posts: 704

United Kingdom 1989 Defender 90 300 Tdi ST Nato Green
Installing door switch and interior sensor into alarm
My 2005 TD5 110 was converted by the previous owner from a pick-up to a hard-top, it has the standard immobiliser/alarm on the front doors but no central locking or interior sensor for the alarm.

I'd like to fit a switch to the back door that activates the interior lights and more importantly connect it into the alarm like the front doors are, should there be wiring in the rear loom already or would it require additional wiring?

On a similar note, is the wiring for the interior movement sensor also contained in the standard loom and is it worth fitting?

Thanks, Harry
Post #561044 3rd Sep 2016 1:35pm
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Harry.O



Member Since: 25 Jul 2014
Location: Warwickshire
Posts: 704

United Kingdom 1989 Defender 90 300 Tdi ST Nato Green
Whilst the headlining is out for sound-proofing I'm trying to get the above done albeit without the alarm sensor for now. The plan is to install a switch for the rear door which activates a 2nd interior light when the door is opened and connect it to the door-operated factory alarm so it illuminates when the vehicle is unlocked with the fob.

I've found the grey plug in the headlining at the front but confused by the wiring diagram and just wanted to check exactly how to connect the wires.

Do I piggy back the 2 purple wires from the front interior light and connect them to the rear interior light then run the earth down to the switch before back to the grey plug or alternatively, run 3 new wires (2 x live and 1 x earth) from the grey plug to the rear light and switch?

Any help is much appreciated Very Happy

Harry
Post #616210 12th Apr 2017 7:25am
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dorsetsmith



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

in the same Gray plug you will find purple brown wire DC + for rear light and black neg side for the light


Click image to enlarge

you have fund Gray plug with purple blue wire for rear door switch


Click image to enlarge


in the same Gray plug you will find wire for interior sensor see below


Click image to enlarge
Post #616229 12th Apr 2017 8:24am
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Harry.O



Member Since: 25 Jul 2014
Location: Warwickshire
Posts: 704

United Kingdom 1989 Defender 90 300 Tdi ST Nato Green
Thank you Dorsetsmith Very Happy

So purple brown and black neg from grey plug to rear light and then purple blue starting at plug > rear door switch > light?

Any idea what type of connectors are required to go into the grey plug? They look similar to the pins on the black ECU plug but wanted to check before ordering them.

Do I need to activate the rear door/10AS link with a Nanocom or will it automatically detect the addition?

Thanks, Harry
Post #616447 12th Apr 2017 10:47pm
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dorsetsmith



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

Do I need to activate the rear door/10AS link with a Nanocom or will it automatically detect the addition?

No as all the door switch work to one in put to the 10AS ( bar the drivers door switch )


So purple brown and black neg from grey plug to rear light and then purple blue starting at plug > rear door switch > light? Yes

also purple white wire to the light from Gray plug

PM PaulMc re connectors
Post #616545 13th Apr 2017 1:23pm
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Harry.O



Member Since: 25 Jul 2014
Location: Warwickshire
Posts: 704

United Kingdom 1989 Defender 90 300 Tdi ST Nato Green
That's great, thank you for your help Thumbs Up
Post #617644 18th Apr 2017 10:23am
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