Starting and Charging Diagnostics in Hayward, CA
A car that will not start wrecks the whole day. Before you buy a battery or an alternator, let Bay Motors Auto Repair test what is actually failing.
What happens when you turn the key?
How the car fails to start is the first real clue. None of it proves which part died.
- Nothing at all, no lights, no sound
- One loud click
- Rapid clicking
- Cranks slowly then gives up
- Cranks normally but never fires
- Starts after a jump, dies later
- Battery or charging light on the dash
- Dim headlights or slow power windows
- Battery. Holds the charge. Flat is a symptom, and it is rarely the whole answer.
- Cables and grounds. Corroded or loose. A perfect battery through a bad ground still just clicks.
- Starter and solenoid. One heavy click, or nothing, with the dash lights still bright.
- Engine. Cranks normally but never fires. That is a fuel or ignition path, not a battery.
- Alternator. Charges the battery while you drive. Fails, and the next start is your last.
Battery, starter, and charging overlap
A dead battery is often the symptom, not the cause. Replacing it without testing the charging system means you get to do this again.
- Testing the battery under load
- Testing charging output
- Checking cables, grounds, and connections
- Checking for a parasitic draw when the symptom fits
- Separating a starting problem from a fuel or ignition problem
- Telling you what the test showed, not just what it needs
What to tell us when you call
Call or text (510) 565-0947. Tell us:
- Vehicle year, make, and model
- Exactly what happens when you turn the key or press start
- Whether the dash lights come on
- Whether a jump start worked and how long it lasted
- Whether the battery has been replaced recently
- Whether the car is at home, at work, or on the road