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An update on the outcome of the under bonnet fuse box problem I had. As it turns out, it was the under bonnet fuse box that has caused the issue. Bought second hand part for £46.50 including delivery; changed the fuse and dried all connections that caused short circuit in the first place; replaced the fried fuse box and followed Paul's advice on battery re-connection process; turned the key and the car started. No need for any coding as stated by Paul. Huge thanks to Paul and Coastline Taxis for the valuable advise. Without your advice the car would most likely be scrapped and I'd have to spend a lot more money on getting a replacement. Thanks again and best regards. :)

Thanks for all valuable information guys. Based on Paul's feedback I have decided to get a second hand part from 1st Choice spares (Cost - £46.50 including delivery as oppose to NEW - £244.50) and try fixing the car. At least if the replacement part burns it will not be such a loss and I'll know that something else, other than water, caused the problem. I'll keep you posted of the outcome once I get the part and the job done.

Thanks for welcoming and quick replay guys. Very much appreciated. paul.h, I am pretty sure this is the fuse box that has failed as smoke was coming out of it as I attempted to start the engine the second time. However, are you 100% sure the under bonnet fuse box is NOT also a BSI module. I suspect it might be as it has three similar wiring connectors to the one for the close by ECU. Below I have attached a link to the image that is exact copy of the part that failed (I hope it works, if not it can be found by typing 9657718780 into Google and searching for images). After this incident I tried to connect my code reader/eraser to the ECU to see any fault codes, but it would not allow me to do so. Furthermore, after the engine stalled the dash went blank and all sorts of warning messages appeared on the screen and front light were completely cut off (even the hazard lights). Paul, you have given some good points for consideration regarding checks to perform and prep work to be done before fitting new fuse box. However, at this point I am considering whether or not it is worth repairing the car as its current market value is between £500 to £1000. So, essentially I want to estimate how much it will cost to repair in order to decide whether to go ahead with the repairs or to scrap it and get new one. If it is as you said that the BSI module on these cars is located in the glove compartment then it might be worth fixing the car provided that no reprogramming is required. Can you or anyone else confirm this? coastline taxis, Provided that I buy new BSI module from Citroen dealer (Cost - £244.50) do you roughly know how much reprogramming would cost and where to get it done?

Hi, I have 2005 Citroen C4 2.0 HDI VTR+ model that I need help with. Recently, while on a trip to pick up my girlfriend from work, the engine suddenly stalled on the go. The car had gone very quiet and as I stopped and tried to restart the engine, it would't start or even turn it over. Uppon quick inspection under the bonnet I susspected that the fault might be with the fuse box/BSI module as a nasty electric burn scent was coming from it. In the following day, uppon closer inspection, I've learnt thet the fuse box was gone due to short circuit caused by water that somehow had found the way through the connection seal. My questions are: Is this a case of simply replacing the faulty fuse box/BSI module or is there more to it? For example some costly reprogramming required. If reprogramming is required then how much will it cost and who can do this work for me? Are there any alternative ways to aproach this issue?Any help with this will be much appreciated. Thanks for taking time to read this post and to all who will replay in advance.