Skip the auto shop - Our mechanics make house calls

Q: Battery has power but when I try to start didn't make any noise

asked by on

Turn key gauges move but doesn't make any noise at all

My car has 70000 miles.
My car has an automatic transmission.

A: There are a few simple things you can do be...

There are a few simple things you can do before you get into a full blown diagnosis.

Number one: Load test the battery. It should carry half the CCA cold cranking amps for 15 seconds without the voltage dropping below 9.8 volts. If the battery is serviceable, use a battery hydrometer to check each cell. They should all read the same and be clear without any black specs or other particulates in them.

Number two: if you can reach the starter, tap on it with a hammer while someone tries to start the car. Don't hit the starter to hard, it can break the delicate magnets inside. If the starter takes off, you need a starter.

Number three: If that doesn't work, use a test light to see if the starter is getting power at the exciter wire. If it does, and the battery tests good, you likely need a starter.

Number four: If all that failed to result in a diagnosis, this step is a bit more complicated. There are two modules involved with this portion of the diagnosis. If you don't feel knowledgeable using a scanner, I recommend booking an appointment with one of our mechanics who can assist you with the diagnoses of why your car will not turn over.

The BCM and ECM work together to send a signal to the starter. The ECM sends the final signal to the starter after the ignition key sends a signal to the BCM. There is some CAN (Computer Area Network) communication occurring to engage the starter.

Good luck. Hopefully one of the easy test will result in a diagnosis.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: My Check Engine Light came on - 2011 Hyundai Accent

When the Check Engine Light comes on, it means the engine controller has detected a fault in one of the sensor inputs and that the fault is bad enough to affect the emissions. Most cars have additional warning lights for...

Q: we replaced the batteries and got all new heavy duty cable wires, truck will not start just makes a click sound.

Hey there. This is a common issue on many vehicles when the starter relay is bad. This is a small unit on the starter that directs power from the battery to the starter causing it to engage the flywheel as...

Q: Fuel pump not pumping gas. 1996 Chevrolet Blazer

Hey there, thanks for writing in about your 1996 Chevrolet Blazer. If you hear the pump, but still get no fuel out of the pump, then you have the power and ground backwards in the wiring or they have it...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.