Need help with C6

[TLCOOP]

My 2005 C6 automatic brake lights stay on when the car is cranked. The Cruise control does not work and it cranks without pushing the brake. I have had the battery checked and have disconnected the battery. I replaced the new Brake Pedal Sensor and still no results. I did notice the Brake Pedal Sensor arm (the one that makes it move with the pedal) was about 1/8 inches closer to the sensor than where the previous one had been. I also pulled the stop lamp in the fuse box and the brake lights still remain on. Can anybody help?

[c4c5specialist]

HI there,

The switch is not adjusted correctly within the BCM.

But I would also be checking for codes as well within the BCM.

Allthebest, c4c5

[TLCOOP]

Will adjust switch. Not throwing any codes. Checked several times with obd ii can. The switch does not appear to be adjustable. If it is what am I missing.? Do you pull out the arm?

[c4c5specialist]

HI there,

Your OBD/CAN will NOT get body control module codes.

That is not going to help you.

You might have a grounded circuit also.

Allthebest, c4c5

[TLCOOP]

How do you make adjustments to the brake pedal sensor?

[c4c5specialist]

Hi there,

I used the incorrect term above.

There is NO adjustment to the brake pedal position sensor, its a calibration of what the BCM sees from the sensor.

You must do a calibration of the sensor with a Tech 2 so that the BCM sees the voltage and understands what is the correct voltage at rest.

Allthebest, c4c5

[TLCOOP]

Is this what they call flash the BCM?

[c4c5specialist]

HI there,

No, you do not reprogram the BCM, you simply allow it to relearn the correct brake pedal position signal.

Allthebest, c4c5

[TLCOOP]

It may be the BCM. Nothing has changed. Is there a way to test it? I still do not understand how the brake lights remain on even after I pull the stop lamp module. BTW, thank you so much for the help you are giving me.