Alternator Output Test
- Remove alternator connector. Turn ignition switch to ON position. There should be battery voltage between IG terminal (Black/Yellow wire) and ground. See Figure or Fig 1 .
- On Integra, check for blown fuse No. 24 or open in Black/Yellow wire between dash fuse box and voltage regulator.
- Test system using an alternator tester with integral carbon pile (to apply electrical load to system). Operate engine at 2000 RPM. Ensure cooling fan is off. Apply load with carbon pile so voltage drops to no less than 12 volts. Check maximum amperage and compare with specifications on chart. See Fig 1.NOTE: Due to engine operation, subtract 5-10 amperes from maximum reading.
- If amperage is within specification, charging system is okay. If amperage is NOT within specification, perform full field test. Full field test can be performed with an alternator tester, or by grounding regulator with metal probe through full field access hole in rear housing. See Fig 2.
- If amperage is still NOT within specification, alternator is defective. If amperage is within specification, replace voltage regulator.