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Old 09-14-2012, 09:18 PM   #1
olson1.1
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Body Control Module replacement

Would anyone know where the BCM is located on a 2003 Ford Focus SE and how to remove it? I am planning to remove the one in the car and have it rebuilt, then re-install. Will it need to be reprogrammed?

Thanks to all for your help.


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Old 09-14-2012, 09:32 PM   #2
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I will ask anyway.... why do you need to rebuild it?

anyway, if you open up the glove box, push the sides in (remove anything in there, trust me ) and pull it open even more, you will see the ECM and the BCM. The BCM is the one with the yellow clip that has 5 plugs on it. (mark their locations, btw)
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Old 09-15-2012, 07:23 PM   #3
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Thank you so much for the advise. I am having serious electrical problem with the focus I just bought for my daughter. Symptoms are that all electrical will go out while driving (headlights, radio, a/c, all instruments, engine light comes on, and car will stall-out then restart while driving). I had most of the electrical serviced, and engine fault codes are discernable. I spoke with a service tech that specializes in refurbishing ECMs/PCMs/BCMs. I thought it was rhe PCM that was defective, but he told me these are classic sysmptoms for the BCM. Cost to bebuild is about $180.00, I've already spent over $2000.00 at the local ford dealership and they haven't fixed anything. Time to leave those thieves and fix myself.
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Old 09-15-2012, 08:07 PM   #4
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I have never heard of a BCM going bad in a Focus.


Call someone higher up in the Ford company. You brought the car in to be repaired, not to spend money on parts you didn't need or wrong diagnosis. 'lets try this at the customers expense' is not good business practice and Ford needs to know this is going on.
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Old 09-15-2012, 08:09 PM   #5
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Loose negatives at the battery terminal will cause this as well. On my car, the factory used ring terminals on the 2 small wires to bolt them to the battery terminal. Well, the ring terminals cracked, and only intermittent contact was being made on one. I had to remove those wires to be able to find the cracks- a visual inspection was not enough.
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Old 09-15-2012, 08:17 PM   #6
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Here is something that I want you to try and it doesn't cost anything

Take your battery clamps and try to move them sideways. Clamps may look tight and maybe you cannot tighten them anymore but if you can move them sideways the connection is no good.

Come back if that is the case and I will tell you how to fix that.

Electronic technician for 35+ years
How can such a module be refurbished? Something is fishy

The poster above me Whynotthinkwhynot says much wisdom

""I have never heard of a BCM going bad in a Focus.""
I am in hell [iaminhell]says wisdom too
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Old 09-17-2012, 08:41 PM   #7
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Connections are tight. Brand new battery, connectors and wiring. New relays as well.
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Old 09-17-2012, 10:15 PM   #8
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""" I am planning to remove the one in the car and have it rebuilt,""""

How would you rebuild this thing?

E.G. an old tube stereo [or whatever]
Check all tubes maybe replace them all with new ones, install a industrial or better yet military grade potentiometer for the volume control, maybe even replace the filter capacitors , clean all switches.

But this module!?
It takes a $10,000 desoldering machine with a technician that is very skilled to remove anything from today's surface mounted circuit cards. Moreover where would anyone obtain the schematics for such devices, Ford will not give them out. It is like have something on a computer mother board go out, while plug in devices can be replaced [CPU, memory] anything else -just toss the thing
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Old 09-18-2012, 12:51 AM   #9
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I kinda think this Ford tech is thinking the newer BCM's are like the old ones (IRCM):


http://jrthecar.com/articles/ircm/assem.html

They aren't.

If I can get to it tomorrow I'll post a pic of it's guts, the Focus BCM.
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Old 09-18-2012, 06:37 AM   #10
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I think you're right. I'l just have to bite the bullet.
Thanks
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