Battery drain

[defender dinky]

Hi all, range rover l322 td6 diesel auto 06, have a battery drain problem, wondering if it could be related to our new security sensor light we put on the house, seems a coincidence problem started few days after fitting it, now battery dead every couple of days, dd

[Shep The Disco]

Well first thing to do is make sure everything is turned off like interior lights etc . check the glove box light is off.

Check all windows are closed and not trying to permanently operate etc etc.

There's a few options for this issue so that's a good place to start.

final stage resistor is the most common cause and is an easy fix.

Edited December 30, 2023 by Shep The Disco

[defender dinky]

Well to start with I disabled security light, to see if still happens, when it stops raining I will be checking alternator, battery, where is the resistor located, another problem don't know if its related but the display screen doesn't always display only getting the land rover emblem and orange light flashing on the audio button,dd

[Shep The Disco]

See if the outside light solves the problem as you say....👍

[defender dinky]

Checked alternator engine running 14.38volts, checked battery with engine off had 11.59volts, engine running 13.39 volts, leave now couple of days park in same place but security light disconnected, hopefully battery will hold charge, dd

[hurbie]

11.59 means a empty battery ..... (or a dead one if you charged it before)

Edited December 31, 2023 by hurbie

[Escape]

If you get that much voltage drop between the alternator and the battery, you either have a poor connection causing excessive resistance or a very high current going into the battery. As above, 11.59V is too low, so the battery wasn't properly charged before or it is not holding charge.

[defender dinky]

Will check battery later, only had a trickle charger to be honest and needed to use the car so took it off, use multimeter later see if it's dropped much off 11.59v, 

[Shep The Disco]

Worth checking it straight after taking the charger off then see after 1 hour the difference.

[defender dinky]

Now have 11.77v so alternator must have put some charge in battery,couple of days ago  would have been flat by now, so it's a good chance it was the security light waking becm up, I will keep an eye on it, dd

[Shep The Disco]

Stick black tape over the sensors. That should solve the problems if that's what's causing it.

Also give the battery a good long charge up .

 

Edited January 1 by Shep The Disco

[FridgeFreezer]

6 hours ago, Shep The Disco said:

Stick black tape over the sensors. That should solve the problems if that's what's causing it.

I suspect it's an RF one as that's how the keyfob remotes work too - mobile phone towers and the like are known to keep "waking up" the alarm system with stray signals.

[Shep The Disco]

3 minutes ago, FridgeFreezer said:

I suspect it's an RF one as that's how the keyfob remotes work too - mobile phone towers and the like are known to keep "waking up" the alarm system with stray signals.

Is there not a movement sensor in the interior of the RR that reacts to light movement in order to detect break ins?

[FridgeFreezer]

47 minutes ago, Shep The Disco said:

Is there not a movement sensor in the interior of the RR that reacts to light movement in order to detect break ins?

If it's PIR then glass blocks it.

[Shep The Disco]

21 minutes ago, FridgeFreezer said:

If it's PIR then glass blocks it.

Yes however what I meant is the RR reacting to the light flicking on and off by sensors looking at the light movement inside the vehicle