Other XC90 Problem: Nothing working except cabin lights

[magxc90]

Hi,
Hope someone can help. I went away for holidays for about a couple of months. Could not unlock car with remote, so manually unlocked the driver door.

Understood the battery was low, so I connected a battery charger for good several hours.

Can't remember if I tried locking/unlocking with the remote, but decided to jump start. I know I connected everything correctly. Started the donor battery car, then tried to start, the dash lights won't come on, neither any ignition. All I hear is a clicks when I rotate the key between positions I, II, and III.

Admittedly, I can't remember the order of when the dash lights went off; whether before trying to jump start or after.

I have checked all fuses, in all three compartments and they are all intact.

A few observations:

1. If I disconnect the battery negative terminal and then reconnect it, the dash lights come on. They automatically turn off after a while but can be turned on or off manually. However, after some time, maybe 5-10 minutes, they can't be turned on or off manually either. If I disconnect and reconnect the battery again, the lights come on. However, they get disabled again.

2. In jump starting configuration, before the ignition, the current flow is around 1.x Amps. When the ignition switch is turned to position II, the current flow changes to nearly 5 Amps. However, nothing happens, as described above.

I have followed pretty much all steps listed in another forum here.

I can't open the doors, neither the tail, from inside the car.

I have replaced the battery on my remote as well, just in case it wasn't sending the signal or something.

Any help will be greatly appreciated, as I am not inclined to tow it to a garage unless I have a cost estimate. I am looking for an auto electrician/mechanic to come and look so that at least I have an idea of the problem.

Thanks,

Mag