Diagnosing the starter requires a action of elimination in the starting line.
The starter has the herculean task of rotating the engine rapidly Sufficiently for the ignition to begin the Engine. Unabridged with commanding armature windings and able-bodied gears, the punishment inflicted on a starter can be unrelenting. It must perform every hour for a happy embarkation. Some starters can fail internally by shorting or burning away. Some starter gears and shafts can wear excessively over epoch and fail to engage with the flywheel, causing a no-start dispute. You can diagnose starter problems to spot the exact source of the failure or malicious performance of your starter.
Bridge the gap between the two largest electrical posts on the back of the solenoid. Be very careful to touch only those posts, and only momentarily. A bright spark arc will be normal.
Provided you hear a clicking or buzzing sound, or extinction at all, test the example of the battery. Assign the vehicle in stadium or impartial with the emergency brake busy. Up thrust the hood. Hook a voltmeter to your battery terminals, with the black lead to con and the cerise prompt to categorical. Discover the voltage. The unit should be a minimum of 12.5 volts. (Build definite the battery is fully charged.)
2. Remove the battery cables from the battery and hook up a battery load tester to the battery posts. Connect the ebony first place to contravening and the cardinal ahead to concrete. Depress the "load" Press-stud, authority it for 15 seconds and Proceeds it. Pocket watch the indicator indicator to distinguish whether it recovers (swings) quickly to the complete charge or 12.5-volt position. Whether it recovers too slowly, or not at all, the battery can be the hot water. Interchange or charge the battery.
3. Eliminate a occupation with the ignition switch by hooking up the battery cables to the battery and attempting to begin the engine. Whether the dashboard "imbecile" luminous dims while starting the engine, it indicates the ignition switch has comprehensive contact.
4. Disconnect the negative battery terminal temporarily. Raise the vehicle up with the floor jack and place two jack stands under the frame near the front wheels. Slide under the vehicle and disconnect the solenoid wire from the top of the starter. The wire connection might be a pull-off spade connector, or it might have a small nut that must be removed. It will be the largest wire. Hook the negative battery cable back up. Connect the voltmeter red lead to the solenoid wire and ground the other lead on the chassis frame. Have an assistant start the motor. You should have 12 or more volts at the wire. If you get no reading, you have a defective ignition switch or a break in the wire from the switch to the solenoid. Check the ignition switch and wires.
5. Connect both battery cables to their terminals. Slide under the vehicle. Use a pair of insulated pliers or a short-handle screwdriver.
Instructions
1. Header to begin your vehicle. This method uses direct battery power to the starter, bypassing the solenoid switch. The starter motor should spin without engaging the engine. If it does not, or makes unusually loud grating noises, it indicates the starter should be replaced or rebuilt.6. Look for the two large posts on the back of the solenoid. Notice the heavy braided wire that runs down into the starter case. Shove the positive voltmeter lead into the braided wire and ground the negative lead to the chassis. Have your assistant start the car. You should hear a heavy clunk and see a 12-volt reading on the voltmeter as the engine cranks over. If it does not show 12 volts, it means the solenoid has failed to send voltage to the starter. Replace or rebuild the solenoid.
