GM started going to central BCMs about 15 years ago and started to trickle them down the line. It reduces the overall amount of wiring in the car and moves everything to a simple central communications network. Other car manufacturers are using the same concept.

Keep in mind, you only need to reprogram the BCM if you're adding fogs using the factory harness and switch. If you're wiring them up directly to their own switched 12v source, no need to reprogram anything.

 

After researching several threads on the factory fogs and the sub-woofer, I have couple questions for you fellas. Just as side note I have an '07 1LT

1) Did any of you have to purchase & install a relay & fuse for the oem fogs?

Reason I'm asking I popped the fuse cover Friday night and made sure all my relays & fuses were seated as per one thread. Thank you to whomever posted that one. 2/3rds were not pushed in all the way... Anyway, I was looking at the cover as to locations of what was what. I discovered that I have a relay & fuse for the fog lights. I don't have any factory fog lights installed (yet).

Still thinking about installing a factory sub was on my mind. So I pulled the inside cover off the console checking fuses. Not knowing exactly what I was looking for I noticed that I had a fuse for an amplifier, but I don't have the Premium sound system. Again, knowing that I wasn't sure if you all have the fuse for the amplifier even though you may not have the premium sound.
I got out the handy meter turned on the key and it was a hot circuit.

2) I didn't think the standard sound system would have a seperate amplifier fuse?

Insofar as wiring in a factory sub... Does anybody know if there is a harness available to go from the HU harness back to the sub / amp location. If not I guess I'll be making my own. Being told that the harness is not already there I can deal with. Being told that it can't be done without splicing into all the speakers is like telling me if you drink water you'll die. What has a begining must have an end...if it has an end I'm pretty sure I can come up with a solution to continue its path. When I do I'll make sure I can pass it on to you folks too...I'll even enclose pictures for those like me that really need them

Sorry for getting off track on the fog lite install... I'm one that is especially thankful for the "how to" on these babys. Cant wait until my hands are back to 100% so I can try and give myself carpal tunnel again by over use of them tinkering on my cars. But I digress

 

Hi!

First time user of this site, so bear with me.

The instructions in this thread for installing Fog lights are fantastic, but I have one question to ask. After taking a part the fuse box, and wiring everything up, then putting everything together again, doesn't this mess everything up like the radio, air conditioner, and computer, what ever?

I guess what I'm trying to say is, after wiring everything, (Assuming everything's wired up correctly.) and putting the fuse box back together, does anything need to be done, before taking it to the dealer to have the BCM programmed?

Curious, what if I didn't have the programming done to the BCM? Would the Fog lights work at all?

 

If wired correctly, the only thing that has to be done is get the BCM programmed.....and if you don't get it done, the lights will not work...regards

 

I had installed and wired my fog lights a while back and was waiting for a time when it needed to go to the dealer for something else to have the BCM done. I took it last week. They turned the warped rotors at no cost under warranty and programmed the fogs. They work very well. $65.00 to enable the lights.

 

what is the bcm?mt nieces hhr has the same fuse box under hood and wire behind dash do i have to get the bcm reprogramed or what ?i have done a lot of wireing to other cars please help mei seen the pics is it a big project?

 

bmc--body control module. Has to be reprogrammed by a dealer. Fogs can be wired by using separate wire, in line fuse, separate relay, separate switch and you will be OK but if you use the wiring and stuff already in the car, these new systems requires the bmc to be programmed by the dealer or it will not work.

 

I INSTALLED THE FACTORY FOG LAMPS AND SWITCH IN MY 1LT, EVERYTHING WORKS WITHOUT THE REPROGRAM EXCEPT THE INDICATOR LIGHT IN THE CLUSTER. WENT TO THE DEALER TO GET IN PROGRAMMED AND THEY COULD FIND A APPLICATION TO REPROGRAM THE BCM, IS IT IN THE CLUSTER INSTEAD, ANYONE KNOW??

 

Find another dealer...fast.
This is a run of the mill standard procedure and if they don't know how to program the bcm, they are too stupid to get your business.

 

anyone who what has to be programmed to make the light on the dash work?