electrical fault 2007 IS250 - Body Control Module Failing?

[Rossosaurus]

I've run into some trouble with my 2007 IS250. Bit of a long story, sorry in advance.

I hadn't used the car in ~4 months as I'd been at uni and come home to find the keys had been locked inside the car while I'd been home because the Battery had died. I hired a locksmith to come out that ended up having to wedge the door open to get the keys as they managed to damage the lock by not picking twice and brute forcing the wafers... Since then a considerable portion of the body electrics have stopped working. Though as I've only discovered this after getting back home I don't know if this problem existed before or if the locksmith has damaged something.

Currently I have no central locking, indicators or lights except dip beam (hazards work though), wipers/washer, on the drivers side the master lock button doesnt work, nor do any of the window switches except the one for the drivers side door. I can still start and drive the car however (assuming it's dry and I don't mind looking like a BMW driver). The door lock switch on the front passengers door does work and when you shut the rear drivers side door you can hear a solenoid or something trying to lock the door but can't for some reason.

The second locksmith I hired to fix the problems caused by the first one stuck a diagnostic on the car after fixing some stuff (Highly recommend Faringdon Autokeys very friendly and know what they're doing) and the code that came back was something to do with a short from the Battery +ve to the body control module I think (I'm waiting for the locksmith to forward the trouble codes to me currently)

I took it to a lexus dealership and they managed to solve the problem for about 5 minutes before it started happening again. The tech said it was some dodgy wire/terminal that caused it near the body control module but if it's come back after 5 minutes the repair was either very shoddy or its something else that been nudged/adjusted in the process. The dodgy wire would line up with the short trouble code and maybe a reason why the Battery died but the tech recommended changing out the master locking module in the drivers door panel first just in case the 1st locksmith damaged something pocking around. I've ordered one thats coming tomorrow as it was only £20 and beats £550 for a new BCM from Lexu plus some of the trim is cracked on mine anyway. My gut tells me it's something to do with the body control module though and I'd like to take a look at the repair job they've supposedly done on this wire and I've also picked up a spare BCM+fusebox for £20 on the off chance a replacement will solve all my troubles.

So my question is, does anyone know how to get access to the body control module on the drivers side? I know it's attached to the interior fuse box but I'm not sure how to actually get at it properly to have a look and does anyone have any other ideas of potential solutions/things to try? Thanks in advance

 

[madasahatter]

The door windows have to be reset one by one. Go to each door individually , push the window down then up. Hold for a second or two then

should all work from the master switch. Did you not have a spare key?? Have you checked the fuses in the passenger footwell. Its a little white box.

box.

[madasahatter]

Just now, madasahatter said:

The door windows have to be reset one by one. Go to each door individually , push the window down then up. Hold for a second or two then

should all work from the master switch. Did you not have a spare key?? Have you checked the fuses in the passenger footwell. Its a little white box.

box.

Number 10 is body control mudule.

[madasahatter]

https://knigaproavto(blocked word)/shemy/en/lexus/is/746-2006-2013-lexus-is-250-300-350-220d-fuse-box-diagram.html

[Rossosaurus]

3 hours ago, madasahatter said:

The door windows have to be reset one by one. Go to each door individually , push the window down then up. Hold for a second or two then

should all work from the master switch. Did you not have a spare key?? Have you checked the fuses in the passenger footwell. Its a little white box.

box.

Haven't tried resetting windows, will give it a go later when I go out to fit the new door module. The dealership checked the fuses and said they were fine but haven't checked them myself. I've seen this image with the BCM and can get at the fuses, I was more wondering what the method would be to take the fuse box and BCM unit out so that I can check the cable harnesses going into it/potentially replace it as I can't find any information on that anywhere.