Alternator & Regulator Chevrolet Camaro III рестайлинг

DELCO-REMY SI SERIES ALTERNATORS

Delco-Remy SI series alternators are equipped with a solid state nonadjustable internal regulator. The Brown field wire to the alternator is used to turn on the alternator. A 10-ohm resistance is provided by the alternator warning light, or choke heater relay when vehicle is equipped with voltmeter, to protect the diode trio.

DELCO-REMY CS SERIES ALTERNATORS

Delco-Remy CS series alternators use a new type regulator which has built-in fault detection monitored by the ECM. A diode trio or test hole is not included. The CS-130 alternator has an internal fan that cools the slip ring end frame, rectifier bridge and regulator.

Note. Manufacturer does not recommend disassembling and servicing CS-130 alternator. If alternator is defective, a new unit must be installed.

Cut-Away View of Delcotron 10SI Alternator. Scheme 1

SI SERIES

Two brushes carry current through the slip rings to the field coil mounted on the rotor. The stator windings are assembled on the inside of a laminated core that forms part of the alternator frame. A rectifier bridge, connected to the stator windings, contains 3 positive and 3 negative diodes, molded into an assembly.

CS SERIES

The CS alternator may be used with only 2 connections, battery positive and an "L" terminal to the charge indicator bulb. Use of "P", "F" and "S" terminals is optional. The "P" terminal connects to the stator and may be connected externally to a tachometer. The "F" terminal is connected internally to field positive and may be used as a fault indicator. The "S" terminal may be connected externally to battery voltage to sense voltage to be controlled.

ADJUSTMENTS

No adjustment or maintenance is required on the alternator assembly. The regulator voltage is preset and no adjustment is provided

TROUBLE SHOOTING

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

ON-VEHICLE TESTS

Note. Ensure battery is fully charged. Ensure all terminals and connections are clean and tight. Check alternator mounting bolt torque and drive belt tension. DO NOT ground the No. 2 lead wire on SI series.

ALTERNATOR WARNING LIGHT STAYS ON

For diagnosis of charging system if alternator warning light stays on, refer to flow chart. (Scheme 1)

Alternator Warning Light Flow Chart Diagnosis. Scheme 2

Scheme 3

Scheme 4

Scheme 5

1. Place ignition switch in "ON" position. Connect voltmeter positive lead to alternator "BAT" terminal and negative lead to ground. (Scheme 3) Voltmeter should read battery voltage.
2. Connect voltmeter positive lead to terminal No. 1 and negative lead to ground. Repeat test with terminal No. 2. A zero voltage reading in step 1) or 2) indicates an open between voltmeter connection and battery. NOTE: Alternators have a built-in feature that avoids overcharging or accessory damage by de-activating the alternator if an open in No. 2 alternator terminal circuit occurs.
3. An open circuit in wiring harness connecting No. 2 terminal and battery may be between terminals. Check crimp between harness wire and terminal. Check for open in wire to battery. If okay, go to step 4). (Scheme 3): SI Series Terminal Locations 10SI alternator is shown.
4. Disconnect negative battery cable. Connect an ammeter in series between "BAT" terminal of alternator and disconnected "BAT" lead. (Scheme 4) Reconnect battery ground cable and turn all accessories on. (Scheme 4): SI Series Bench Test & On-Vehicle Undercharged Battery Check
5. Connect a carbon pile (or alternator tester) across battery. Operate engine at a speed of 2000 RPM and adjust carbon pile as necessary to obtain maximum current output. If ampere output is within 10 amps of rated output stamped on alternator case, alternator is okay.
6. If output was not within 10 amps of rated output, ground field winding tab by inserting a screwdriver into end frame test hole. (Scheme 5) If test hole is not accessible, disassemble alternator and test components. (Scheme 5): Ground Field Tab Through End Frame Hole (SI Series Only)
7. Operate engine at 2000 RPM and adjust carbon pile as required to obtain maximum current output. If output is within 10 amps, check field windings, diode trio and voltage regulator. If output is not within 10 amps of rated output, check field windings, diode trio, rectifier bridge and stator.
8. To check for overcharged battery condition, check field winding for grounds and shorts. If defective, replace field. Check regulator with a regulator tester.

CS Series Charging System Wiring Diagram. Scheme 6

1. Disconnect wiring harness connector from alternator. With ignition on and engine off, connect a voltmeter from "L" terminal to ground. A zero reading indicates an open circuit is present between terminal and battery.
2. Reconnect harness connector to alternator and operate engine at moderate speed. Measure voltage across battery. If greater than 16 volts, alternator must be repaired or replaced.
3. Turn on all accessories. Load battery with carbon pile to obtain maximum amperage. Maintain voltage at a minimum of 13 volts. If amperes are within 15 of specification, alternator is okay. If not, alternator should be repaired or replaced.

Note. Alternator Diagnostic Tester (J-26290) is used to quick check alternator systems. It will detect most charging system faults.

1. Turn off engine, lights and accessories. Connect Alternator Diagnostic Tester (J-26290) to alternator. (Scheme 7) If tester light flashes, go to step 3). If tester light stays on, tester is at fault and should be replaced. If tester light is off, remove tester plug from alternator.
2. If tester plug is removed from alternator and tester light flashes, rectifier bridge is faulty. If tester light stays off, check for 12 volts at terminal No. 2 of harness connector. Repair wiring or terminal if zero voltage is available. If voltage is available, tester is faulty.
3. Observe tester light with engine operating at fast idle with lights and accessories off. If tester light is off, charging system is okay. If tester light is on, remove alternator and check diode trio, rectifier bridge and stator. If tester light flashes, remove alternator and check voltage regulator, rotor field coil, brushes and slip rings.

SI Series Diagnostic Tester Connections. Scheme 7

1. Connect a fast charger and voltmeter to the battery. (Scheme 8) Turn ignition on and slowly increase rate of charge. Vehicle alternator light will dim at voltage regulator setting.
2. Voltage regulator setting should be a minimum of 13.5 volts and a maximum of 16 volts. If voltmeter or vehicle alternator light do not operate as specified, replace voltage regulator.

Note. Voltage regulator test is valid, providing rotor field windings are okay. Regulator will test okay even though rectifier bridge or diode trio may be bad.

On-Vehicle SI Series Voltage Regulator Test. Scheme 8

Scheme 9

1. Set ohmmeter on "x1000" scale and check rotor windings for grounds. (Scheme 9) Connect one ohmmeter lead to rotor shaft and second lead to each slip ring. Resistance should be infinity. If not, replace rotor. (Scheme 9): Bench Testing Rotor for Grounds & Opens
2. Set ohmmeter on "x1" scale and test rotor for opens. Connect an ohmmeter lead to each slip ring. (Scheme 9) Resistance should be 2.4-3.5 ohms. If not, replace rotor assembly.

Stator Grounds

Set ohmmeter to "x1000" scale. Connect one ohmmeter lead to stator frame and other lead to each stator lead. Resistance should be infinity. If not, stator is grounded and must be replaced.

Stator Opens

Note. Delta windings of 15SI, 17SI and 27SI series alternators cannot be checked for open circuits. If other checks are normal and alternator fails to supply rated output, windings are probably defective.

To check for open conditions of 10SI and 12SI stators, set ohmmeter on "x1000" scale. Attach ohmmeter leads to any 2 stator leads. Check each combination of stator leads in succession. If any ohmmeter reading is infinite, a winding is open and stator assembly must be replaced.

Diode Trio

1. Remove diode trio from end frame assembly. Connect one ohmmeter lead to brush connector and second lead to one of 3 stator lead connectors. Reverse ohmmeter probes. (Scheme 10) If one high and one low reading is obtained, diode trio is okay. If readings are identical, replace diode trio.
2. Repeat test, touching leads in turn from single connector to each of 3 stator lead connectors. If any reading is zero, a short is indicated. Replace diode trio. Check rectifier bridge before replacing diode trio.

Bench Testing SI Series Diode Trio. Scheme 10

Scheme 11

1. Connect one ohmmeter lead to grounded heat sink. Connect second ohmmeter lead firmly against flat metal portion of terminal (not threaded stud). (Scheme 11) Reverse leads to same heat sink and terminal. If readings are identical, replace rectifier bridge. (Scheme 11): Bench Testing Rectifier Bridge (All Models)
2. If one high and one low reading is obtained, rectifier bridge is okay. Repeat test between grounded heat sink and 2 flat metal connectors. Test between insulated heat sink and each of its 3 flat metal connectors.
3. Check remaining bridge rectifiers in same manner. DO NOT replace rectifier bridge or diode trio unless one pair of readings are the same.

Voltage Regulator

1. Remove voltage regulator from rectifier end shield. Connect a voltmeter and battery charger to 12-volt battery with test light attached to voltage regulator. (Scheme 12) Test light should come on.
2. Turn charger on and slowly increase charge rate to 13.5-16 volts. Test light should go off. If test light does not go off, replace voltage regulator.

Note. Temperature may vary voltage regulator operating specifications.

Bench Testing SI Series Voltage Regulator. Scheme 12

Bench Testing CS Series Alternators. Scheme 13

CS SERIES BENCH TESTS

1. Mount alternator on a test stand. Make connections as shown in charging system wiring diagram. (Scheme 13) Leave carbon pile disconnected. Ground polarity of alternator and battery must be the same. Ensure battery is fully charged. Use a 30-500 ohm resistor between battery and terminal "L".
2. Slowly increase alternator speed and observe voltage. If voltage is uncontrolled and increases to more than 16 volts, rotor field is shorted and/or regulator is defective. A shorted rotor field coil can cause the regulator to become defective.
3. If voltage is less than 16 volts, increase speed and adjust carbon pile to obtain maximum amperage output. If output is within 15 amperes of rated output, alternator is okay. If output is not within 15 amperes of rated output, replace alternator.

Exploded View of 10SI Alternator. Scheme 14

Drive End Frame Bearing Assembly. Scheme 15

Removal (2.5L)

1. Disconnect negative battery cable.
2. Disconnect battery cable and harness connector at generator.
3. Remove rear brace bolt. (Scheme 16)
4. Remove bolt at tensioner.
5. Remove alternator through bolt.
6. Remove alternator.

Installation (2.5L)

1. Install alternator.
2. Install alternator through bolt.
3. Install battery cable and harness connector at generator. Pivot alternator, for access, if necessary.
4. Install bolt at tensioner. (Scheme 16)
5. Install rear brace bolt.
6. Install through bolt.
7. Install negative battery cable.

Removal (2.8L)

1. Disconnect negative battery cable.
2. Loosen top alternator bracket-to-engine bolt. (Scheme 16)
3. Remove upper alternator bracket-to-engine bolts (2).
4. Raise vehicle.
5. Remove right rear wheel.
6. Remove splash guards.
7. Remove toe link rod outer end (swing up and to the left).
8. Remove lower alternator bracket-to-engine bolt.
9. Remove alternator adjusting bolt.
10. Remove alternator belt.
11. Remove upper alternator-to-bracket bolt.
12. Remove alternator wiring.
13. Rotate alternator bracket lower end toward engine.
14. Remove alternator.
15. Remove alternator shield.

Scheme 16

Installation (2.8L)

1. Install alternator with shield.
2. Install wiring.
3. Install upper alternator-to-bracket bolt.
4. Install alternator adjusting bolt.
5. Rotate alternator and bracket up into position.
6. Lower alternator bracket-to-engine bolt.
7. Lower vehicle.
8. Install upper alternator bracket-to-engine bolts (2).
9. Install top alternator bracket-to-engine bolt.
10. Raise vehicle.
11. Install alternator belt.
12. Install alternator adjusting bolt.
13. Install toe link rod outer end (do not change the adjustment).
14. Install splash guards.
15. Install right rear wheel.
16. Lower vehicle.
17. Install upper alternator-to-bracket bolt.
18. Install negative battery cable.

ALTERNATOR SPECIFICATIONS

DELCO-REMY "DELCOTRON" ALTERNATOR TEST SPECIFICATIONS

See also:
• TROUBLE SHOOTING - BASIC PROCEDURES