Q: Car not starting, even after jumpstart

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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.

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