Body Control Module Repair for Cheap or Free - Escalade - Circuit Board Soldering - BCM

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This is how to repair a body control module circuit board on a General Motors vehicle, for cheap or free as long as you have the low cost tools. This one is from a 2000 Cadillac Escalade, but there are similar modules in other GM vehicles like the Camaro. The symptoms are that the windows and the radio will be intermittent or stop working completely.
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[@deglockness]

I'm not the master of soldering, but I've had a lot of experience after taking it up as a hobby. I would recommend to anyone else trying this to first apply a small amount of flux to the bad solder joint and remove all of the old solder using desoldering braid or a desoldering iron/remover from the area around the pin with the defective soldering joint. Once the area is cooled, clean the area with isopropyl alcohol to prepare it for the repair. When the area is dry, again, apply a small amount of flux to the pin and the area directly next to the pin on the circuit board. Finally, solder the pin back onto the circuit board, preferably using 60/40 tin lead solder. That type of solder is recommended for electronics, as it is less brittle and will last longer. Just remember to be cautious not to inhale the fumes from the solder and wear gloves or wash your hands once the work is completed. Solder containing lead is slightly hazardous and should be used cautiously.

[@wedgeantilles7731]

Perfectly said! Thumbs up

[@sattsall9753]

U d man

[@ronmaryw]

I actually did that. I appreciate the advice. :)

[@adrenalinehigh2070]

yup!

[@GKrutz]

From the bottom of my heart THANK YOU FOR THIS VIDEO. 2 months of dealing with issues. Cadillac dealer saying $850+ to fix. 1 dead batter 1 set of burnt cables lol. And then this and my spot was the exact same bad spot. I fixed in 2 min and now all work. Thank you thank you thank you sir...keep doing you!!!!

[@awesomenesssprime8118]

Just fixed my 2004 Nissan Quest BCM - battery was draining and interior lights would not come on. Took apart, re-soldered obviously screwed-up joint - saved $300+ thank you!

[@aj-oi8dr]

My bcm needed to be replaced, door locks were unblocking/ locking while I was driving and even when the key was in the ignition. Radio light's statred to flicker as well. Drained my battery bought a used bcm for only $50 had someone to program it for $200 problem solved and way cheaper than what the dealership tried to charge me!

[@flynlowfishn5404]

This is awesome. Also: FYI - This same process can be used to fix your flakey (dim, failing pixels, etc) spedo display panel. Cold solder joints! What a pain!

[@stevelozano9523]

I better look into this for my ats as getting loss of electrical from time to time like a dead battery. Changed most grounds in rear but no change and read bcm might be cause. If this fixes it, you are a hero😁, but first I got to find it.

[@moaqt11]

Great video. I have a question. My car Toyota Camry 2012 bought it days ago. I can’t unlock the door with remote key (it doesn’t work at all) I can only open it with the key and only the driver door opens. Then I need to start the car in order to open the other doors. When I want to lock the doors I have to do it while I’m in the car otherwise I can only lock the driver door with key. Lastly, the clock is always resetting itself every time I turn the car on. Sorry it’s a long story, your help is much appreciated! Thanks,

[@tedmoss]

Take it from a real soldering expert in hand soldering, you do not have to go through all the steps if your board is a good board and they used good solder, the only thing is to use plenty of flux and you are not going to find any tin-lead solder in most places nor is it necessary. One of the problems with these boards is they use the solder to hold the parts on the board, never recommended for moving machinery, the tabs should be twisted to hold the part on the board first, then soldered. Get a bigger soldering iron for larger parts like this.

[@richardkidd5026]

My high beam have constant power will not turn off.2012 buick verano What would I look for on the bcm .

[@rishawnafisher7382]

Where is the bcm located in a 2004 jeep liberty

[@wedgeantilles7731]

Nice!

[@travismcdonald6128]

I have a 05 Yukon by the way have you heard of this problem

[@davidduncansr8948]

can you please tell me where the body control module is on a 2010 Mitsubishi endeavor is at

[@aDIYCarGuy]

sorry i have no idea...i read in the 04 it's the same as the ecu located in the relay box in the engine bay...can't find anything on 2010

[@zakkhann2122]

sir plzz my cruzz BCm has fail cn you plz repair it...

[@mrdeanv4414]

Great video...! My 2007 Ext Cadillac reverse lights stay on when the key is turned off and I've already replaced the switch that's connected to brake pedal.. could this be something faulty in the BCM ?

[@tedmoss]

Possible, check the schematic.

[@ApexKilla49_]

Does this work for a bcm that has gotten wet? I bought a mini cooper that had the passenger side window down and it got soaked. Car runs but its doing all kinds of crazy stuff.

[@1988camarokid]

Clean it with alcohol and some q tips

[@rubenlepe2907]

thanks homie

[@aDIYCarGuy]

no problem man

[@joerodgers63]

Hi "a DIY Car Guy" I have a 2002 Park Avenue - running lights and dash lights go out, and intermittent buzzing under the dash and flickering headlights that kills the battery, then it stops for a while. Does this sound like a "re-solder the BCM" issue to you? (BTW fuses are good) Oh, and please forgive if this sounds like a dumb question, but is the "body control module" (BCM) the same as the "lamp control module" (LCM as listed in the fuse box)?

[@aDIYCarGuy]

kzbin.info/www/bejne/gpisdamZprWcaqc check out this video, might be similar to what you're experiencing

[@sammyj184]

Hi sir My escalade 2008 sunroof not working - I tested motor and it turns - the fuse is good... I looked at the sunroof board looks fine. - what do you suggest ?

[@aDIYCarGuy]

+jay s If the circuit runs through a relay it could be a shot relay, I would also test the sunroof switch with a test light.

[@bobbaxter952]

I had a problem with the driver side indicators not working on my Fiat,replaced the indicator/turn signal relays on the BCM circuit board.Now 'both' sides of my car the turn signals aren't working lol,and more interestingly the car no longer recognises my keys!!!! I only replaced two relays damnit!

[@TufRiverboards]

when you repair your bcm, does it still need to be reprogrammed by a gmc dealer?

[@aDIYCarGuy]

It shouldn't, mine did not need to be reprogrammed.

[@charley408]

TufRiverboards no

[@MALUMEMALUME-mn9tg]

What was the error code ?

[@latemodelclassics]

When repairing solder joints like this, they usually fail because modern solder is lead free and brittle. Lead in solder allows it to be flexible and less prone to breaking like this. Repair with a leaded solder like 60/40 tin/lead and use a little flux on the joint before starting. The flux will allow to solder to flow better and make a better connection with less effort. I use Chipquik No-Clean flux. You can use a standard solder pen like this guy has. Heat it up and rub the tip into a wet sponge to clean the old gunk off before starting.

[@thatguyontheright1]

This is before manufacturers dropped leaded solder.

[@jamesmcqueen2618]

When you install the module after unplugging it to make repairs will the car start and run? Or do you have to reprogram something?

[@aDIYCarGuy]

it should start and run, no programming needed as it's already programmed to the car, at least with the escalade this is true

[@jamesmcqueen2618]

Thanks , I have a 2004 Chrysler Sebring convertible so I really don't know for sure. Thanks just the same and God Bless. (Mac)

[@aDIYCarGuy]

you're welcome and best of luck!

[@vettrious]

The issue is....when your PCB has epoxy all over the board like most do like say, cadillac BCMs, you can't use flux, alcohol, etc. without making a big mess or contaminating the solder so you have to be very careful and just touch the cracked joint in question.

[@bodeine454]

Can you help me diagnose if the BCM might be what's wrong with my 1995 Buick Riviera? The radio will change stations randomly a lot of times and also the volume will go all the way up and I have to manually turn it back down. Also, the climate control/ac temp settings will fluctuate up or down and these things seem to happen a lot of times when I apply the brake pedal. Also, sometimes when I'm driving the climate control/ac will come on by itself. It just started doing this(ac coming on by itself) within the past week and I'm not sure if it only does it when I apply the brake or if it does it randomly. But a lot of these things seem to happen when I'm just starting the car and hit the brake pedal. Does this sound like a bad BCM or just a short/shorts somewhere in the wiring?

[@aDIYCarGuy]

it could be either....I'd start with the BCM because that's the easiest

[@tedmoss]

This sounds like an open somewhere in the circuit, the radio volume is not likely to be controlled by the BCM..

[@bodeine454]

@@tedmoss I sold the car a couple years ago.

[@rubenlepe2907]

hello can you tell me the name of the welding thing

[@timbraun2900]

If you are wording it that way, you may be best to hire another or replace.

[@gristlevonraben]

Soldering iron with small tip, and very thin solder wire

[@stevelozano9523]

At least you didn't say dingaling.😂

[@1988camarokid]

Looks like you got the board hot

[@aDIYCarGuy]

meh it's quite alright

[@cddog1995]

I'm thinking my BCM is my issue in my suburban. Abs light, parking brake light Service 4wd,service brake system, no blower motor, no cruise, and it doesn't crank sometimes. New ignition switch, new starter, new battery, new water pump, fuses are good. I guess it's worth a shot to look at it. Do you now if a bcm will cause the specific issues I'm having? My windows and radio work fine.

[@aDIYCarGuy]

sounds like the bcm, it causes dash lights to come on, causes no start. It might control the cruise and blower but I'm not sure

[@cddog1995]

a DIY Car Guy alright. Thank you. I took mine apart just now and there are 2 points, that look burnt up and need to be resoldered

[@ronmaryw]

This seems to be a typical problem. Mine, too. I just did a resolder. OK for now. Does anyone know the reason for the problem. What is causing the overheating? I habe a felling, I'll be doing this again to replace the relay, which seems a bit hearder to find. Comments appreciated. Did you do a fix and did it fail, again? :)

[@stevelozano9523]

I recall a soldering problem on the early 90s honda due to manufacturing using poor material once they got heated due to use. Once resoldered, Permanently fixed the issue.

[@2216sam]

where is it located

[@aDIYCarGuy]

+samantha garcia under the part of the center console that has the wood grain tray that says "CADILLAC" on it

[@baptizedbyfire13]

This is great info. Now a question for you... have you used this method on any other module? I have a 2003 CTS with a bad roof mount antenna module. This module is responsible for receiving signals from the remotes for door unlock and trunk popper. I am wondering if I can repair it because supposedly my specific module is obsolete and hard to obtain. I also don't want to bring to the Caddy dealer to have them reflash the new module (if i am lucky to find one). Just the reflash will probably cost whatever Caddy labor is for an hour. It's literally less than 5mins to flash with their Tech II Scanner and the closest dealer ship is like 20 miles away from me. Lol

[@aDIYCarGuy]

It's always worth a try, I've done it on all kinds of modules...climate controls, relays, cruise controls, etc. Just have to look at the circuit board and see if there are any cracked solder points.

[@binuthampy820]

I need bcm repair.

[@TheBrandon448]

I had a repair tech tell me that my car needs this because my car wont start. Does this sound right?

[@aDIYCarGuy]

Open it up and take a look, that's the only way to know for sure.

[@charley408]

No reprogramming. Only when you buy a new one.

[@timbraun2900]

He did say he bought a used one, a.k.a reprogram. ;)

[@travismcdonald6128]

I'm having issues with my door locks locking and unlocking on their own and my dome light going on And off on its own does that sound like a bcm problem ?

[@tmrdarkstar85]

Depends on the car as for the Yukon, Tahoe Escalde's yes it is the BCM.

[@noahhussey5033]

Travis McDonald jkkkk

[@JW-qq6bu]

My impala does exactly same, figure yours out yet?

[@leso204]

Put some flux on it next time ....

[@edwincastillo8280]

+a DIY Car Guy hey man. can I get a used BCM and use it for my suv. or does it have to be the same # on the BCM

[@aDIYCarGuy]

Sorry I'm not sure, you can get a used one, but it might need to be flashed by a dealer if it doesn't work. The replacement should have the same part number so that it matches all of your options like keyless entry and what not.

[@edwincastillo8280]

+a DIY Car Guy yeah that's what I need to know. it's pretty expensive, they don't sell them. they just send it to get repaired. it's cheaper to get a used one.

[@aDIYCarGuy]

Edwin Castillo Ah, sorry I can't help on that front, I've read mixed opinions on it, some people say it needs flashed, some people say it doesn't. If you can open yours up and see if it just needs resoldering, maybe I could resolder it for you...I could set up a listing on ebay or just go through paypal for the repair service. I repair climate controls usually, but obviously from the video I can solder other modules lol. I charge 29.99 with free return shipping for soldering car circuit boards.

[@edwincastillo8280]

Thanks man. What exactly is flashing. Is that something that they can do at an auto shop, or just the dealer?

[@aDIYCarGuy]

Edwin Castillo np, I think just the dealer...flashing programs the unit to accept the vin number of the vehicle usually for anti theft purposes

[@2216sam]

k thanks alot

[@aDIYCarGuy]

+samantha garcia no problem

[@stilldeveloping]

I am dying of suspense...did that fix the problem?

[@aDIYCarGuy]

+Naomi S it did fix the problem

[@stilldeveloping]

+a DIY Car Guy I am looking in to learning how to solder. This looks like a handy skill, and I think it would open up a whole new level of DIY for me. The dealership wants to charge $1500 to replace the BCM. Thanks for posting this video, and helping people like me learn about new DIY possibilities.

[@aDIYCarGuy]

Awesome, it's a very useful skill that you can use throughout your life. For 1500 bucks it's worth getting some practice in and seeing if you can fix it yourself lol. Also they go for about 200 used on ebay. Or I could solder it for about 32.99 lol. I repair climate controls for Preludes regularly and have a repair service listed on my ebay store, if you buy that and send me the BCM I could take care of it. My ebay store link can be found in the links in my channel banner or in the "about" section. Either way, thanks for watching!!

[@binuthampy820]

your From

[@tmrdarkstar85]

Not a good idea espically if the relay is bad I did this an it literally smoked my BCM However for around $300 you can get a pre-programmed one from the guys called 1 day auto i believe is their name. Still cheaper than the thousand dollar or more that the dealer will charge to you put in a new bcm an reprogram it.

[@aDIYCarGuy]

that makes no sense....you're saying don't attempt to save $300 by fixing something that's already broken...if it burns up it doesn't matter, it was already broken, in most cases it's not going to burn up. additionally, i paid myself by keeping the $300. that's the whole point of my channel lol

[@tmrdarkstar85]

Just saying that I tried that method first. The problem is the circuit boards are multi-core boards so heat can damage it. All I am saying is its not for everyone to try it. Believe me I went to a junkyard an grabbed another BCM myself an on this BCM the relay went bad for the power locks this time....Not going to risk pulling the relay off my old an swap it with the bad one on this current board instead i'm going to save the nasty burnt electronic smell in my truck again but just buying a new one already programmed is a safer option. However usually when the relay goes bad it pops/melts the solder due to the heat generated from the relay going bad. My comment is only to educate those willing to give it a try an save the money they do need to know the risk. Mine worked for a week until it smoked I still have the smoked BCM.

[@aDIYCarGuy]

gotcha, thanks

[@JosaphineBailey]

Where is the video on how to remove BCM? There is no click here button

[@samaelmartinus3273]

Lol that's what I said! He pointed at nothing 😆

[@JB91710]

The same one was burned on another video.

[@aDIYCarGuy]

You mean someone took my video? Send me the link?

[@JB91710]

@@aDIYCarGuy No. They just found the same prodlem.

[@user-ss6zt2mo1l]

Omg. Put some silver solder on the iron before you overheat the board and the joint.

[@aDIYCarGuy]

lol, it's fine

[@jimbobooth5822]

Wait the radio isn't supposed to be intermittent? Lol

[@aDIYCarGuy]

jimbo booth it was so annoying lol

[@jimbobooth5822]

a DIY Car Guy i bet , so did it work?

[@aDIYCarGuy]

yea this fixed it....i should have put a clip of the windows and radio working lol

[@jimbobooth5822]

a DIY Car Guy no worries bud , your solder looks really good

[@aDIYCarGuy]

thanks! I've soldered A LOT of 4th gen Honda Prelude climate controls! lol

[@rubenlepe2907]

hello can you tell me the name of the welding thing

[@aDIYCarGuy]

Hi, it's a "soldering iron," I have a link to see / buy one in the description

[@tonyweavers4292]

@@aDIYCarGuy Or as you USA folk say, "Soddering Iron"

[@2tallB]

@@tonyweavers4292 dictionary = sädər

[@2tallB]

oh, now I see, it is pronounced with L in the UK ;)