Cold Cranking Test

The battery must be fully-charged and load-tested before proceeding. Refer to Battery in Battery.

1. Connect volt-ampere tester to battery terminals (1), (2) and (3). See instructions provided by manufacturer of volt-ampere tester being used.
2. Fully engage parking brake.
3. Place gearshift selector lever in Park position.
4. Verify that all lamps and accessories are turned off.
5. To prevent a gasoline engine from starting, remove Automatic ShutDown (ASD) relay. To prevent a diesel engine from starting, remove Fuel Pump Relay. These relays are located in Power Distribution Center (PDC). Refer to label on PDC cover for relay location.
6. Rotate and hold ignition switch in Start position. Note cranking voltage and current (amperage) draw readings shown on volt-ampere tester.
a. If voltage reads below 9.6 volts, refer to Starter Motor in Diagnosis and Testing. If starter motor is OK, refer to Engine Diagnosis in 9, Engine for further testing of engine. If starter motor is not OK, replace faulty starter motor.
b. If voltage reads above 9.6 volts and current (amperage) draw reads below specifications, refer to Feed Circuit Test.
c. If voltage reads 12.5 volts or greater and starter motor does not turn, refer to Control Circuit Testing.
d. If voltage reads 12.5 volts or greater and starter motor turns very slowly, refer to Feed Circuit Test.

NOTE: A cold engine will increase starter current (amperage) draw reading, and reduce battery voltage reading.