Alternator whine and dim headlights: notes for when a tow feels like overkill

# Alternator whine and dim headlights: notes for when a tow feels like overkill Humidity, sun load, and idling in traffic change how A/C and cooling behave—context is diagnostic fuel. We start with **symptom timing** (cold vs hot, idle vs cruise) and confirm **powertrain behavior** before quoting labor. Message with **year, make, model, mileage**, and **when the symptom happens**—it saves time on arrival. _Educational overview only—not a remote diagnosis of your vehicle. Estimates depend on inspection and your approval._