I WAS JUST WONDERING IF ITS POSSIBLE TO INSTALL A VAFC 2 WITHOUT DISCONNECTING THE BATTERY. I HAVE AN ALARM AND WHEN I TAKE THE BATTERY OFF, THE HORN GOES OFF. I THINK ITS SOME KIND OF BACKUP SIREN. SO MY QUESTION IS CAN I CUT AND SPLICE WIRES FOR THE VAFC WITH THE BATTERY STILL ATTACHED AND AN UNPLUGGED ECU. THANX

 

Yes. I didnt disconnect my battery.

 

of course u can, just be carefull when wiring, don't let +and - get each other.