Alternator & Regulator Eagle Talon I

DESCRIPTION

Alternator has an internal fan and Integrated Circuit (IC) electronic voltage regulator. Internal IC electronic voltage regulator is part of the rotor, brush and brush holder assembly. (Scheme 4) Voltage regulator automatically reduces regulated voltage when ambient temperature increases, so battery charging voltage is maintained at the proper level. Charging system voltage is maintained at an operating range of 13.1-15.4 volts. Alternating current is rectified to direct current by 6 diodes. A CHECK ENGINE warning light is used to indicate charging system malfunction.

Scheme 1

BELT ADJUSTMENT - 1.8L & 2.0L 4-CYLINDER

BELT ADJUSTMENT - 1.8L & 2.0L 4-CYLINDER

BELT ADJUSTMENT - 2.2L & 2.5L 4-CYLINDER

BELT ADJUSTMENT - 2.2L & 2.5L 4-CYLINDER

BELT ADJUSTMENT - V6

BELT ADJUSTMENT - V6

TROUBLE SHOOTING

Note. See the TROUBLE SHOOTING - BASIC PROCEDURES article in the GENERAL TROUBLE SHOOTING section.

BATTERY VOLTAGE TEST

Connect negative voltmeter lead to negative battery post and positive lead to positive battery post. Record battery voltage for comparison with other test results.

VOLTAGE DROP TEST

Note. Ammeter with clamp-type test lead is recommended. Before performing any on-vehicle tests of the charging system, alternator belt tension must be checked and adjusted (if necessary). See ADJUSTMENTS .

1. Disconnect battery ground cable and alternator output wire from alternator terminal "B". Connect ammeter in series between terminal "B" and disconnected output wire. (Scheme 2) Connect digital voltmeter between terminal "B" and positive battery terminal. Reconnect battery ground wire.
2. Start engine, turn on or off lights and accessories and adjust engine speed so ammeter reads 20 amps. Voltmeter should read 0.2 volt or less. If voltage is higher, check for poor wiring between alternator terminal "B" and fusible link to positive battery terminal. Also check for loose connection or color change due to overheated harness. Correct problems before testing again.

Scheme 2

AMPERAGE OUTPUT TEST

Note. Ammeter with clamp-type test lead is recommended. Perform test quickly after starting engine, as charging amperage will drop quickly.

1. Disconnect battery ground cable and alternator output wire from alternator terminal "B". (Scheme 3) Connect ammeter in series between terminal "B" and disconnected output wire. Connect voltmeter between terminal "B" and ground. Reconnect battery ground wire.
2. Ensure voltmeter reads battery voltage. If voltmeter reads zero volts, suspect an open in wire between alternator "B" terminal and positive battery terminal, a blown fusible link or poor ground.
3. Turn on all electrical accessories. Start engine and accelerate to 2500 RPM. Read maximum output amperage. If alternator amperage output is within 10 percent of rated output, alternator is functioning properly. See «ALTERNATOR SPECIFICATIONS»(/eagle/talon/i-1989-1994/remont/charging-system/#alternator-regulator) table.

Scheme 3

VOLTAGE OUTPUT TEST

Note. For following test, battery must be fully charged and alternator wiring plug must remain connected.

1. Disconnect battery ground cable and alternator output wire from alternator terminal "B". (Scheme 3) Connect ammeter in series between terminal "B" and disconnected output wire. Connect positive voltmeter lead to alternator terminal "S" and negative lead to ground. Reconnect battery ground cable.
2. Turn ignition on and ensure voltmeter reads battery voltage. If reading is zero volts, check for an open circuit in wire between alternator terminal "S" and fusible link.
3. Ensure all accessories are off. Start engine and run at 2500 RPM. Read voltmeter when ammeter drops to 10 amps or less. Compare voltage reading with specifications in «REGULATED VOLTAGE»(/eagle/talon/i-1989-1994/remont/charging-system/#alternator-regulator) table.

REGULATED VOLTAGE

RECTIFIER TESTING

Note. Stator must be unsoldered from rectifier assembly prior to testing either unit. Perform all soldering and unsoldering quickly to avoid exposing diodes to excessive heat.

1. Use ohmmeter to check for continuity between positive diode lead and heat sink on positive diode side. There should be continuity from diode lead to heat sink and no continuity in opposite direction. Repeat test for each diode. If meter readings are not as specified, replace rectifier assembly.
2. Repeat test for negative diodes. Check for continuity between negative diode lead and heat sink at negative diode side. There should be continuity from diode lead to heat sink and no continuity in opposite direction. Repeat test for each diode. If continuity is not as specified, replace rectifier assembly.

STATOR WINDINGS GROUNDED TEST

1. Inspect stator laminations closely for signs of overheating. A burnt spot usually indicates shorted stator winding. Set ohmmeter on "x1000" scale. Connect one ohmmeter probe to one stator lead and other probe to stator laminated core. Ohmmeter reading should be infinity.
2. If meter needle moves, stator winding is shorted to core and must be replaced. Repeat test for each stator lead. DO NOT touch probes or stator leads, as an incorrect reading will result.

STATOR WINDINGS OPEN TEST

Set ohmmeter on "X1" scale. Connect one ohmmeter probe to stator lead and other probe to another stator lead. If no meter movement occurs, stator coil is open and must be replaced. Repeat test with other stator leads. DO NOT touch probes or stator leads, as an incorrect reading will result.

ROTOR OPEN OR SHORT CIRCUIT TEST

1. Remove rotor from alternator. Set ohmmeter on "X1" scale. Connect each probe to one rotor slip ring. Reading should be 3-5 ohms. Higher reading indicates damaged slip ring solder connection or broken wire.
2. Lower reading indicates shorted wire or slip ring. Replace rotor if damaged. Connect one ohmmeter probe to slip ring and other probe to rotor core.
3. Ohmmeter reading should be infinity. Reading other than infinity indicates rotor is shorted to shaft and must be replaced. Damaged slip ring terminals or solder touching rotor shaft will cause shorted condition.

ALTERNATOR R & I

On air conditioned models, remove condenser fan motor. Remove all drive belts. Remove drive pulleys on water pump. Remove alternator brace and wiring harness from alternator. Remove alternator. To install, reverse removal procedure.

Scheme 4

ALTERNATOR SPECIFICATIONS

Note. No further specifications are available from manufacturer.

ALTERNATOR SPECIFICATIONS

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

See also:
• TROUBLE SHOOTING - BASIC PROCEDURES
• ADJUSTMENTS