Hi, I am having a problem with excessive electrical power drain when I come to a stop in my 2001 Ford Mustang V6.
For example, when I have my headlights on and I come to a stop, the engine will go down to about 500 RPM or less and shudder. This will also happen if I put down both power windows at once when at a stop, the RPMs will drop and engine will shudder. This usually does not happen if the lights are off, the radio is off, the fan is off and I am not moving the windows up or down.
In my unprofessional opinion, it does not seem that I am getting enough electrical power.
Could it be a weak battery or failing alternator or is this just normal?
My car: 2001 Ford Mustang V6, stock.
Thanks in advance!