Car Starter Motor Current Draw. In step two the key remains in start --step one completes the solenoid is fully pulled in solenoid contacts switch the full battery power to the motor through the heavy guage battery circuit and thepull-in coil is de-energized so that as much current. In vehicles that use an electric starter a motor provides that starting force.
Pin On Cars And Motorcycles from www.pinterest.com
A good general rule-of-thumb figure is one amp starter draw for every cubic inch of motor. A characteristic of electric motors is that they produce the highest torque when stationary coupled to this is a very high initial current 400 to 600A for cars and commercial starter motors. To turn over the engine the starter motor requires high electric current which means the battery has to have sufficient power.
It is must be diagnosed and repaired as early as possible.
Only perform the test. Pulling it in requires a lot of current as something is being moved so theres briefly a fairly large current draw on the pull-in coil through the solenoid circuit. If it were only 50A the expected volts drop would only be about 05v. Testing a starter motor on the car or truck is a pretty easy test.
