Motorola Alternator Wiring Diagram
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If, after testing your alternator, you discover that it must be removed for overhaul or replacement, carefully mark all the wires Delco Style tits Mercruiser & OMC Voltage Reg. Purple or Blacky Ignition Red B + Battery + Sense Red Ignition Late Motorola/Prestolite Style Fits MerCruiser & OMC AC Tap Tachometer Terminal (Not MOTOROLA (WITH EXTERNAL REGULATOR) MOTOROLA ALTERNATOR (WITH EXTERNAL REGULATOR) STATOR WINDING 51 AND 62 AMPERE ALTERNATOR POSITIVE DIODE ASSEMBLY J?7 9i ROTOR FIELD WINDING STATOR WINDING 37 AMPERE ALTERNATOR REGULATOR HARNESS CONNECTOR Motorola.alternator wiring diagram SPLIT SPRING WASHER WOODRUFF KEY , NEGATIVE DIODE ASSEMBLY REAR HOUSING MOTOROLA (WITH EXTERNAL If an overcharge of 1015 amps is indicated, check for a faulty regulator, or a bad ground at the regulator or the alternator. Testing the Ignition Switch to Regulator Circuit 1. Disconnect the regulator wires from the regulator. 2. Turn on the key. Using a test light or voltmeter, check for current between the voltage supply wire and ground. This wire is usually orange and has another wire connected to it, usually blue or orange with a tracer 3. If current is present, this part of the system is OK.Typical Motorola alternator system charging circuit (©American Motors Corp) Motorola alternator — exploded view.(© American Motors Corp) Typical wiring circuit diagram, Prestolite C.B. alternator system Autolite cold. means of a 75 ohm resistance unit between the ignition coil and the alternator (inside the regulator). It is quite important that this resistance unit be checked and found satisfactory before proceeding with subsequent tests. The charge indicator light on some cars Motorola (S.E.V. Marchal) Regulator If the Motorola A.C. regulator is found to be defective, it must be replaced. No adjustments can be made on this unit. The following test may be performed on the Motorola regulator to see if it is functioning properly. An ammeter, tachometer, and voltmeter are required. 1. Connect the alternator and regulator as shown in the illustration..V. For regulator ambient temperatures other than 77°F, consult the voltagetemperature diagram for cold regulator. 3.Disconnect the negative battery cable. 2. Disconnect the leads or plug socket from the old regulator taking note of their location. 3. Remove the holddown screws from the old regulator and install the new one. 4. Connect the leads or plug socket and reconnect the negative battery cable. A. Alternator B. Battery 60 Ah C. Voltmeter 0 — 20 amps. D. Ammeter 0 — 50 amps. E. Voltage regulator F. Warning lamp 12 volts. 2 watts Wiring diagram for testing Motorola regulator A. Alternator B.JD45C — Exploded view of Motorola Alternator of the type used. Parts which differ are marked (E) (early) for Model 5010 or (L) (late).for Model 5020. Most of the other Fig. JD45E — Series 30004000 diesel wiring diagram. Heavy markings. G. Bearing 7. Stator 8. Insulated sleeve 9. Rear end frame 10. Brush holder color code. Refer to Fig. J045F for color code 8. Output (cold) Volts 30 Amperes 10 RPM 1650 Regulator Model VBO6401AJ3 Cutout Relay Air gap 0.0250.027 Point gap Bosch A.C. Regulator (35, 55, 70 amp) The Bosch A.C. regulator is fully adjustable. To determine which adjustments are necessary — if any — perform the following test. (An ammeter, 12 V control lamp, tach 20 ♢20 ♢40 ♢60 ♢80 Voltagetemperature diagram for cold regulator — Motorola Wiring diagram for testing Bosch A.C. regulator A. Alternator B. Voltage lamp 12 volts C. Control lamp.12 volts, 2 watts D. Voltmeter 020 volts F. Regulator resistance G. Battery 60 amperehours H.°lQDE PLKTESTUD Y F P I o nu ene\ MODE TERMNN8 To NoCharge [gd Indicator Light To Ignition Switch Coll + Yellow—> Black 4 / ~l i \ T To Main Wire Harneu Oran' '/ rm" Rectifier diode test points (positive or negative) 5°""'Y ¢i""i' Ground r.,,,,;,.,| Prestolite wiring diagram Diode tests are the same as for the Motorola alternator. field Terminal lrolation Diode \ egutator Ovlpvt n Terminal h"n;n°| by tapping lightly with a fiber hammer to separate them from the front housing. . The rotor Alternator mechanical noises are usually the result of misalignment between the Vbelt and the pulley,.a loose or broken pulley, worn bearings, or a bent rotor shaft. lf any of these faults is found, replace the alternator or, where applicable, correct its installation. Replacement Engines Replacement engines with the Motorola alternator have regulator wiring different from that of previous cars with separate regulators. A diagram of the revised wiring used with the integralregulator