Berlingo Parasitic drain

lavericklaverick · Unread post by **lavericklaverick** » 30 Dec 2020, 16:00

Hi,
(Berlingo 2012 deseil)

My battery is going flat so I've stuck a multimeter in series, i get around 0.5A being drawn (car locked, wait 3mins).

To check what it could be i disconnected each fuse one by one to see what it could be but the current remained at 0.5A.

When the car is running I get 14.5v on the terminals so seems like the alternator is fine.

It seems like it must be a component that is doing it, not just a shorted cable since the current is pretty low.

Does anyone have any suggestions? I was thinking of doing the BSI next (bit hesitant incase i screw something else up doing that).

Many thanks in advance,

Andrew

wheeler · Unread post by **wheeler** » 30 Dec 2020, 16:44

Is there any non original electrical equipment fitted, Handsfree kit, stereo, towbar wiring etc?
Did you disconnect every fuse? under bonnet & inside? remember there are also maxi fuses hidden under the under bonnet fusebox.
You should only have around 0.04 amps after the BSI powers down after around 3 minutes.

Gibbo2286 · Unread post by **Gibbo2286** » 30 Dec 2020, 17:19

Aftermarket alarms used to be notorious for this.

white exec · Unread post by **white exec** » 30 Dec 2020, 17:51

0.5A is about 6W, so also check for something like a boot light not going out.
You should be able pin it down by a bit more of what you've done already - pulling every fuse.

lavericklaverick · Unread post by **lavericklaverick** » 30 Dec 2020, 22:54

hi everyone, thanks so much for your replies!

I did the fuses on the ecu and in the glove box, will hunt down the rest.

The only thing thats been added was a stereo (by me, just a hardness but disconnected) and there are towing lights that have now been disconnected, will check that out too.

Is there any risk to doing a bsi reset? I read it was possible that it doesnt get to put back to sleep and can keep drawing power.

Thanks again for your help.

lavericklaverick · Unread post by **lavericklaverick** » 31 Dec 2020, 12:24

All sorted. it was the trailer lights, removed the fuse and the drain has gone down to around 5mA.

Thanks again for everyone's help, first time fixing a problem with a car.

Happy new year!

white exec · Unread post by **white exec** » 31 Dec 2020, 12:58

Result! Well done in nailing that down.

Unread post by **Paul-R** » 31 Dec 2020, 13:25

Now find out what in the trailer lights was sucking the power. Go to it!

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