Locked out of GC600 due to flat battery

[Angela&Phil]

Had gc 600 4 years now and for 1st time main battery is dead (it’s been on drive about 4 weeks doing nothing with leisure isolator switch off). Problem is I’m locked out. None of keys will open it, either by fob buttons or the physical key in the driver door. Does anyone know a fix?

 

[lohr500]

Can you connect the mains hook up, or by sod's law, is the cable inside the van?
Not sure if the mains hook-up charges the starter motor battery on a GC, but it might be worth a try. Hopefully it will put enough charge in the vehicle battery to allow the door lock actuators to work.

 

[WelshGas]

Had gc 600 4 years now and for 1st time main battery is dead (it’s been on drive about 4 weeks doing nothing with leisure isolator switch off). Problem is I’m locked out. None of keys will open it, either by fob buttons or the physical key in the driver door. Does anyone know a fix?

If the physical key won’t turn in the lock then try some WD40 squirted into the lock and turn the key clockwise/anti-clockwise gently until it makes a full turn. Hopefully door will then open.
The engine battery is under the front passenger seat.

 

[Angela&Phil]

Thanks all - Sod’s Law did apply and charger cable was inside - but got cheap 3-pin to campervan plug adapter on next day delivery and plugged in via normal extension lead and (after about 3 hours) finally when I put physical key in heard click and driver and passenger door unlocked. Then jump started and left running long enough for battery to get a charge. I don’t think I’ll use the isolator switch again, since never had an issue with main battery until I used it!