Circuit/System Testing

Ignition OFF, measure and record the C1 Battery voltage at the terminals.
Verify the measured voltage is between 12.0 - 15.0 V.
- If voltage is less than 12.0 V or greater than 15.0 V
  Refer to Battery Inspection/Test .
- Go to next step: If voltage is between 12.0 - 15.0 V
Test for less than 0.5 V between the positive battery terminal and positive terminal at the X50D Fuse Block - Battery with the ignition in the CRANK/START position.
- If 0.5 V or greater
  Replace the positive battery cable.
- Go to next step: If less than 0.5 V
Test for less than 0.5 V between the positive battery cable at the X50D Fuse Block - Battery and terminal 1 X2 or A X2 at the M64 Starter Motor with the ignition in the CRANK/START position.
- If 0.5 V or greater
  Replace the positive battery cable.
- Go to next step: If less than 0.5 V
Test for less than 0.5 V between the negative battery cable and the M64 Starter Motor case with the ignition in the CRANK/START position.
- If 0.5 V or greater
  Replace the negative battery cable.
- Go to next step: If less than 0.5 V
Perform Battery Inspection/Test Using the EL - 50313 Midtronics Battery Tester/Charger.
- If Battery Fails the Test
  Replace the C1 battery.
- Go to next step: If the Battery Passes the Test
  Go to next step: Replace the M64 Starter Motor.