Q: battery tested fine, car won't start

asked by on January 10, 2017

Took battery to Autozone, it's fine. Lights work, car won't start. No sound at all.

My car has 200000 miles.
My car has an automatic transmission.

One way to diagnose this is to use a voltmeter to check for battery voltage at the starter motor when the key is held in the "start" position. If there is power to the starter motor, and yet it doesn’t operate, the starter is usually the fault although there could still be a scenario where there is excessive voltage drop and that has to be tested for, as well. If there is no power at all, it has to be confirmed that any engine immobilizer (security) system is de-activated (and thus not a cause of no power). Once that is confirmed, the starter circuit has to be traced to find the fault causing no power delivery to the starter. Such faults are typically wire breaks, faulty fuses, faulty ignition switch, relay, ground and so forth. if you desire that the problem be resolved by a certified mechanic, the recommended service to request is a no start diagnostic. If you request that diagnostic, the problem you are presenting is usually resolved quickly.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Car is slow to turn over

It seems you have three issues. If the engine is cranking slowly, the battery, the starter, the alternator, and the wiring will all need to be checked. The battery is the most likely problem, especially since your Infiniti is more...


If the engine swap was for a "complete", 100% assembled engine, the gaskets (oil pan and valve cover) are already in place. If the engine swap was a complete rebuilt (re-manufactured) engine, you needn't worry about leaks at the oil...

Fuel pump not working, changed it, also new battery and alternator , still no fuel pumping

Hi there. Are you getting battery voltage at the fuel pump? Double check the fuses with a digital volt/ohm meter and measure voltage on both sides of fuse to verify continuity. Your fuel pump circuit should have a relay or...

Related articles

How to Make Car Switches Last Longer
Every Every feature in your car is controlled by a switch or button. Most are actively controlled, such as the power windows and power door locks, by means of pressing a button. Systems that are actively controlled include: The...
Starter or Car Battery: How to Diagnose Which Part is Bad?
A dead car battery is a common cause for a car not starting condition. A faulty car starter motor can have similar symptoms, but the fix is different.
Symptoms of a Bad or Failing Starter Relay
Common signs include the vehicle not starting, starter staying on after the engine started, intermittent issues starting, and a clicking sound.