Alternator Output Test
- Remove alternator connector. Turn ignition switch to "ON" position. There should be battery voltage between "IGN" (Black/Yellow) terminal and ground.
- If no voltage is indicated, check for a blown No. 11 fuse or an open in the Blue/Yellow wire between dash fuse box and voltage regulator. If okay, go to next step.
- On Integra, connect a voltmeter and ammeter (100-amp capacity) between alternator "B" terminal and White wire. See Fig 1. An inductive pick-up can be used instead of disconnecting White wire.
- Start engine and turn on headlights, blower motor, rear window defogger, etc. If voltage stays above 13.5 volts, apply more electrical load to lower voltage to below 13.5 volts. If voltage increases to above 16 volts, replace voltage regulator.
- Compare readings to chart. See Fig 2. If there is no output or reading is below specification, go to step 7). If output is within specification and voltage is between 13.9-15.1 volts, go to next step.
- Turn off all alternator loads. Measure alternator output voltage with alternator at 15,000 RPM. If voltage is between 13.9-15.1 volts, alternator and regulator are okay.
- Perform a full-field test. Insert a screwdriver into brush holder screw hole in alternator and cover. While screwdriver is touching brush screw, ground it against the cover. Check amperage when grounding screwdriver.CAUTION: Ground screwdriver for as short a time as possible. Do not exceed maximum recommended voltage of 16 volts.
- Compare amperage reading from full-field test with chart. See Fig 2. If reading is not within specification, alternator is defective. If reading is within specification, voltage regulator is defective.