Sunday, 14 August 2011

Starter On car

i began by de-activating the igntion system to prevent the starter from engaging.
then i removed any surface charge that may have been on the battery by switching on the headlights to take it off.
while cranking, i checked the available voltage at the battery terminals:

Cranking voltage spec: 9.6volts

Cranking voltage 11.47 volt
which was a pass.
  1. Check loss between battery positive post and solenoid starter input stud while cranking.

Spec less than 0.20 volts, Volts drop 0.18 V1 Pass 
  1. Check loss across solenoid main input and output terminal studs while cranking.

Spec less than 0.10 volts, Volts drop 0.07 V2 Pass 
  1. Check loss between battery negative and starter motor body while cranking.

Spec less than 0.20 volts, Volts drop 0.01 V3 Pass 
  1. Add all the voltages drops together to find maximum voltage drop.

Maximum Allowed 0.50 volts, Total volts drop 0.26Volts Pass 

below are the given instructions for the measuring the current draw of the motor.  if the reading is above specification this could indicate resistance along the circuit

  1. Set the meter on 400 amps DC and push the Zero Button to zero the meter, if the reading doesn’t Zero push the Hold Button and repeat the procedure.

  1. Once the meter is Zeroed clamp the pick up around the positive battery lead anywhere between the positive terminal and the “B” terminal of the solenoid.

  1. Have someone crank the engine and as it is cranking push the hold button, this will retain your reading.

Starter current draw: 103.2 amps. Pass 



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