battery/central locking problem

[evertonfc]

I've been having problems starting the car (2001) since I bought it nearly 5 years ago. I bought a new battery soon after the replacement the dealer put in died (obviously a used one).
the car wont start if left more than 2 days, or overnight in winter.
The ignition just clicks.

The last time it did this it threw up a long list of voltage codes, which i cleared with a laptop OBDwiz app. BUT the check engine light wouldn't go out. A friend tried to fix the MIL with his snapon Solus (that insisted there was a 20pin OBD plug, but I couldn't find one and the VIN says the car was built in October 2000 so just after the 20 pin was discontinued.

I thought that if I removed the battery and fully charged it overnight then perhaps that might reset the MIL and it would go out.

Unfortunately, while replacing the battery and after checking the terminals were oriented properly, i was distracted and dropped the battery into the trunk the wrong way round.
I connected the terminals and there was a big spark and the alarm went off and took its sweet time to recognise the key. even with the engine running!

Now the car runs ok but the battery light is on as well as the MIL.
The central locking doesn't work either on the key (it wont resync) or the console switch neither will the tailgate unlock from the switch or key.
The front window lifts work (but not one touch down) the rear lifts don't work at all.
Doors only unlock manually.

I checked the glovebox and rear fuses and they seem ok.
Obviously I've blown something. any idea what would blow and leave the fuses intact?

As for the battery/charging light i took the car for a run and put all the lights on, no loss of power and the car accelerated as normal despite this extra draw on the "not being charged" battery.


Oh and I just noticed the battery is type 48, when it should be a 94R.