Another GM Security Problem!!???HELP!!!!!!!

[Tech II]

No, the original would not have to be reprogrammed.....the one that replaced it, could have been programmed wrong or was the wrong BCM....

[skynut831]

Can a BCM be reprogrammed outside the vehicle?
Can I send it to someone to be programmed or does it have to be with the vehicle?
So far no bad fuses found -rear fuse panel!
Its been slow going because of weather and not having help !
Thanks!

[Tech II]

I don't believe a BCM can be programmed outside the vehicle.....

Like many modules in GM, one module with a specific part number, can be used in different cars,,,,that's why it has to be in the car to be programmed for the specific car.....and depending on the year, you can't just swap modules, because in the newer vehicles, the module has to have the car's VIN number in it.....if you try to swap one out of another car, even with the same year, model, and options, that module will not work in another car....

Are you just trying to shotgun parts on this, or do you have access to something like a GM Tech II scan tool.....

[skynut831]

I do not have any way to a tech 2 !
I am trying not to shotgun parts on it, I am not rich enough to have it moved to a dealer 3 hours away,and have not found a local tech 2 mechanic either!
I asked about sending out a bcm for programming only as a for thought that if that's what it turned out to be,I would be prepared to send it out !
As of today!
I have no power in the front fuse box to the fuses that run fuel injectors ,sir!? and Ignition 1 and 2 fuses !
Horn and headlights still inop but fuses have power! Horn relay does click!
That's as far as I got before my back gave out !
Thanks!
If I am being a pest say so ,I will no longer write !
Thanks

[Tech II]

Well, you are kind of between a rock and hard place.....

One of the first things you have to do is check for codes......you also have to see if you can communicate with various modules in the car.....to do this, you need a scan tool like a Tech II.....loss of communication with a module happens 4 ways.....loss of power....loss of ground.....open/short in data line.....bad moduel....

You also need schematics to trace power concerns.....could be something as simple as an open wire or a bad ground....if a visual inspection shows nothing, then tracing schematics is a must......

[Blue Bowtie]

It may help to split the system down the middle and determine a direction to investigate. Does the IGN1 relay energize with the key in the RUN/START positions?

If NOT, can you jumper the 87 and 30 contacts and make it start?

Has anyone checked the voltages into and out of the ignition switch?