Skip the auto shop - Our mechanics make house calls

Q: Car not starting, even after jumpstart

asked by on

My car will not start, even after I jumpstart it.

Hello. When a car won’t start, power to the starter motor must be checked, and voltage drops performed. The starter motor is mounted under the intake manifold, so alternative test points must be used to test the starter motor. The larger wire at the starter motor should have 12v at all times, and the smaller wire should have 12v in the Start position. If voltage is good, then a voltage drop should be performed between the battery positive, and the same two wires in the Start position. If the reading is less than 0.5v, the wiring is good, and the starter has failed. If there is a lack of 12v at either wire, then the circuit must be checked to find the open circuit. A certified mechanic, such as one from YourMechanic, can properly diagnose your non-starting issue.

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

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

Q: FAULTY ALTERNATOR CONNECTION

Hello. You have a very peculiar problem. It is probably be best if a technician or someone else with a little more car experience help you look at it first hand, though it sounds like you have car experience yourself....

Q: What are the signsof a bad tensioner pulley?

The most common cause of noise in the front of the motor having to do with the accessories is the tensioner and idler pulley bearings get noisey. I have also seen where the a/c compressor pulley bearing gets noisey. You...

Q: Car would not respond when I turned the key...Tried 2 or 3 times same...came back 1/2 hour it is fine.

Hello! An intermittent failure of a start response can be many things - a bad ignition switch, starter solenoid, or in your case - the keys use a "raised-chip" design for security. With years of wear, the key/ignition switch become...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...