You need to have a volt meter reading of the battery circuit when you have the system cranked up. It may be taking the electrical system down low enough to effect the voltage going to the BAS/ESP systems, causing the light to come on.

Try to monitor the car voltage when cranked. You can buy a digital meter to plug into your cig lighter to monitor voltage.

James

PS My son had some similar issues with his Blazer. He had to buy a high output alternator to correct the problem. He also installed a digital read out volt meter on the dash so he knew how loud he could go before it would effect his charging system.