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RobTempest

Member Since: 04 Dec 2014
Location: Eastbourne
Posts: 12

2011 Defender 110 Puma 2.4 SW Santorini Black

Radio mischief

Hi My radio has started turning its self on in the middle of the night any ideas anyone ?

2011 ws 110

17th Jun 2015 6:33pm

mrd1990

Member Since: 16 Aug 2012
Location: Wales
Posts: 600

Is it the original radio?
Are the keys in the ignition and at position 1 or 2 when it happens?

There's a number of possibilities such as a faulty head unit, does the cigarette socket also become live?

17th Jun 2015 9:17pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20367

Sounds like there must be 12v becoming present in the ignition wiring for the HU thus turning it on permanent live.
The ignition pin should be completely 0v with ignition off at rest.
Remove the HU and use a multimeter to check for voltage at the ignition pin on the connector block.
ISO on a 2011 I'd imagine.

If there is voltage there with keys completely removed there is something causing it somewhere which will need checking out.
If it reads dead 0v then there is something up with the HU it's self.
The only power it should be using is Milliamps approx 2-3mA (variable) via the permanent live feed which is of course permanently live at rest.
Whilst running and switched on it will draw much more current circa 8A or so again variable.

The only way to sort this one will be fault finding, but first step you can at least determine if it's the HU or the vehicle.
Probably the latter and probably relay related. But just a guess

17th Jun 2015 10:22pm

RobTempest

Member Since: 04 Dec 2014
Location: Eastbourne
Posts: 12

Thanks i wonder what i will be doing this weekend !!

18th Jun 2015 8:18am

RobTempest

Member Since: 04 Dec 2014
Location: Eastbourne
Posts: 12

Hi Keys are out of the vehicle & all locked up -- i am in bed , or was. Its happened several times, not sure about cig socket. I can only think that the head unit is faulty. ( may be an excuse to buy a nice new shiny one !!)

Rob

18th Jun 2015 8:20am

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20367

You should remove it ASAP in case you end up with a flat battery, it'll be fine without it in no problem.
As you'd have to have it out anyway this is why I thought you may as well check the wiring.

18th Jun 2015 9:44am

EWS

Member Since: 29 Nov 2011
Location: Bristol
Posts: 156

I also have this problem, the unit switches on /lights up and tries to run a cd, thankfully none in the the slot, never done this over night though,usually when one is switching off the ignition. Very weird !!!!

21st Jun 2015 10:39pm

RobTempest

Member Since: 04 Dec 2014
Location: Eastbourne
Posts: 12

Hi Do you know it has not happened at night for sure because mine turns itself off again !! Then on at random. I removed the fuse & left it over night, put it back in the morning & it has'nt done it since. or my daughter hasnt got me up tp turn it off for over a week ( her window is close to my landy) Hope it lasts !! Rob

22nd Jun 2015 9:10am

delab

Member Since: 13 Apr 2014
Location: Cornwall
Posts: 19

1996 Defender 110 300 Tdi CSW Epsom Green

I'm curious as to your solution as my radio likes to turn itself on ay night too.... with a free 15 mins this evening pulled all fuses and relays cleaned, ACF50'd and replaced. Let's see...

22nd Jun 2015 6:57pm

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