Electrical problems

[Landcruiser]

Hi
I’m in need of urgent help. I have a swift conqueror 645 year 2011 I stupidly connected the power cable to the car with the 240 v still connected causing an electrical problem. I now have no lights or water pump and an alarm sounding from the control panel with flashing light.
Any help would be appreciated.

 

[Woodentop]

Connecting the two shouldn't cause any issues I would have thought.

Try the old 'Sky' trick. Disconnect mains and then disconnect caravan battery. When you reconnect the battery see what happens?

 

[Landcruiser]

Connecting the two shouldn't cause any issues I would have thought.

Try the old 'Sky' trick. Disconnect mains and then disconnect caravan battery. When you reconnect the battery see what happens?

Thanks I’ll give it a go.