Originally Posted by
onehundred80
Look at the pump/security module in the trunk. Look at all the fuses and check they have not blown. Little steps at first.
Originally Posted by
Toolman
Electrical connectors that were covered in water are more likely to corrode and create problems now and in the future. Some areas could still be holding water. I would go first to the "Security System Module / Central Locking Pump - under trunk padding on right side". Others have had problems with trunk leaks and water getting in that area. Water shorting electrical circuits will cause low voltage and problems for other areas.
This is where you need to start. If the rear of the car was flooded then as
OneHundred80 and
Toolman correctly pointed out, your Security System Module & the Central Locking Pump was flooded (and probably is
still under water because once water gets into that pocket it does not drain out by itself . . ). Take off the rear trim panel in your trunk and take off the right side trunk trim panel. Lift out the styrofoam piece and you'll see the area (as pictured below) that you need to check. If it's full of water open up a drain plug and drain it out. Review further information in the post link below. Open up the central locking module and try to dry it out. Also get yourself some dielectric silicone compound grease. Clean up all the connectors and apply dielectric grease to the connections before reconnecting the wiring harnesses.
https://www.crossfireforum.org/forum...tml#post491510
Start with this. Complete checking this area / drying everything out / cleaning all the connectors and applying the dielectric grease before reconnecting the wiring. When you have that done all that and have a good battery connected. Let us know the status and the trouble codes you pull . . .