D21 Terrano draining battery

[Rusty]

Something in my Terrano is draining the battery overnight.

Any ideas on the matter? I'm hopeless with electrical stuff!

It's a new battery (3 months old), alternator, whilst it isn't the strongest charger, still provides charge.

Cheers

[Crash bandicoot]

Any recent additions to the electrical system accessories etc

[Mattman]

Do you have a meter? If so put it in amps mode and undo the positive cable and put the meter inline between the cable and battery.

Remove each fuse one at a time noting the current on the meter. When it drops away you have found the circuit.

[Rusty]

Nah mate, no recent additions to the electrics.

Excellent plan. The battery is freshly charged so I'll give it a red hot crack today

[fh2014]

If I know terranos, im betting door lighting circuit, activating extremely dim footwell lights. Turn interior lights to door setting, close all door and boot. if lights still on, theres a door press-switch fault somewhere. Seen this on nearly every terrano.

[Rusty]

Interesting!

So I charged the battery and pulled fuses out one by one. No joy. Decided I'd change the alternator. With the alternator out, voltage dropped to zero!

Changed it out and bam. Good to go.