OEM 2000 Chevrolet Prizm Alternator

2000 Chevrolet Prizm Alternator Parts Questions & Experts Answers

• Q: How to Service and Repair an Alternator Using Resistance Measurements on 2000 Chevrolet Prizm?

  A: Start the alternator service and repair process by checking rotor slip ring resistance with J 39200 before continuing. The rotor requires replacement when its resistance reaches 2.7-3.1 ohms at room temperature (20°C or 68°F). The next step involves measuring rotor slip ring to rotor resistance with J 39200. A rotor replacement is necessary when its resistance measurement shows less than 5 ohms. Check the rotor slip rings using the J 26900-5. The rotor replacement is necessary due to two conditions: first, a diameter measurement below 12.8 mm (0.504 in) along with rough or scored slip rings or second, when the diameter measureme Use the J 39200 to measure the resistance between all stator leads and if any result exceeds 5 ohms then replace the stator. Any reading above 5 ohms for stator resistance indicates the need for a new stator. Test every stator lead's resistance to the stator core using the J 39200 and replace the stator if any reading falls below 5 ohms. A stator requires replacement when its resistance measures less than 5 ohms. Check the J 26900-5 to determine the brush exposure length A brush holder replacement is needed when the brush holder assembly exposes less than 1.5 mm (0.059 inch) of brush area. Use the J 39200 to check the resistance between the rectifier positive terminal and each rectifier terminal , perform this test again with probe reversal. Measurements revealing a resistance between 5 ohms indicate replacing the rectifier while readings above or below this threshold call for rectifier replacement. Use the J 39200 to measure resistance between rectifier negative terminal and each rectifier terminal while also conducting a second measurement by switching the probe positioning. Check the resistance between rectifier terminals again since both readings must be below 5 ohms or above 5 ohms to pass the test. If this fails to meet the criteria replace the faulty rectifier.