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WARNING: If equipped with diesel engine, attempt to start engine a few times before proceeding with fol- 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 b. If voltage reads above 9.6 volts and current (amperage) draw reads below specifications, refer to Feed Cir- cuit Test in this section. c. If voltage reads 12.5 volts or greater and starter motor does not turn, refer to Control Circuit Testing in this section. d. If voltage reads 12.5 volts or greater and starter motor turns very slowly, refer to Feed Circuit Test in this section. NOTE: A cold engine will increase starter current (amperage) draw reading, and reduce battery voltage read- FEED CIRCUIT TEST The starter feed circuit test (voltage drop method) will determine if there is excessive resistance in high-amperage When performing these tests, it is important to remember that voltage drop is giving an indication of resistance Example: When testing resistance of positive battery cable, touch voltmeter leads to positive battery cable clamp The following operation will require a voltmeter accurate to 1/10 (0.10) volt. Before performing tests, be certain that • Battery is fully-charged and load-tested. Refer to Battery in 8, Battery. • Fully engage parking brake. • If equipped with manual transmission, place gearshift selector lever in Neutral position and block clutch pedal • Verify that all lamps and accessories are turned off. • To prevent a gasoline engine from starting, remove Automatic ShutDown (ASD) relay. To prevent a diesel 1. Connect positive lead of voltmeter (1) to negative battery cable terminal post. Connect negative lead 8F - 50 STARTING SYSTEM KJ |