Trickle charging into the accessory socket?

[AMG Merc]

I've been trickle-charging sucessfully direct to the battery with my CTEK Zafir90 charger. To make it easier, I just fitted a connector to plug directly to the in-dash accessory socket and the charger goes haywire (lights flashing). Clearly there is a device or voltage between the socket and the battery but what?

I know that numerous others here have posted that they connect directly to the socket with no problems.

[Biggriff]

they have been direct wired by the dealers. easy to do.

[andrewr]

I connect to this socket with my Airstream trickle charger no problems. It is a Lotus one left over from when I had my Elise.

I also have a trickle charger by the fuse box wired in by Mole Valley for the first owner, but I have never used it.

Regards
Andrew

[sean_goodman]

mine si also fine plugged into socket.

youve not got doors open have you? thus interior light pulling current

[AMG Merc]

sean_goodman said:

mine si also fine plugged into socket.

youve not got doors open have you? thus interior light pulling current

No Sean, key out of ignition and doors closed. I've never played with the wiring to the socket from new so something else must be affecting the circuit. Tried connecting directly to the battery again - perfect!

[joust]

Obvious point, but you sure it's not wired on backwards. Most chargers flash all their lights or similar if you connect back to front.

J

[ThatPhilBrettGuy]

joust said:

Obvious point, but you sure it's not wired on backwards. Most chargers flash all their lights or similar if you connect back to front.

J

or does the socket still work? Fuse etc due to large charge current.

[AMG Merc]

Thanks guys, will tinker more at the weekend if its not snowing!