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Specifications
- MFR: MITSUBISHI
- DIM 1: 26mm ID Slip Ring Cover
- FEATURE 1: 100% New
- SPECS FOR: Mitsubishi IR/IF Alternators
- SPECS: 12 Volt, A-Circuit, S-L Terminals, 14.4 Vset
Used On
- Subaru (1989-1995)
Replaces
Mitsubishi: A866X15770, A866X15772
Original Reference Number: 157
Subaru: 23815-KA030
Lester Numbers
13303, 13480
Unit Numbers
Mitsubishi: A001T03391, A001T03791
Subaru: 23700-KA240, 23700-KA360
Vehicle Application
Subaru Car
Justy L3 1.2L 1189cc CARB 1989-1991
Justy L3 1.2L 1189cc FI 1990-1992
Justy L3 1.2L 1189cc 1993-1995
Features & Benefits
- Precision aftermarket replacement part
- Regulates alternator output voltage
- Helps maintain proper battery charging
- Supports stable charging system performance
- Manufactured to match original specifications
- Designed for dependable long-term operation
- Ideal for alternator rebuilding and repair
- Cross-referenced to OEM and aftermarket part numbers
What Does a Voltage Regulator Do?
The voltage regulator controls the alternator's output by regulating current supplied to the rotor field winding. As electrical demand changes, the regulator continuously adjusts field current to maintain the proper charging voltage for the battery and the vehicle's electrical system.
A properly functioning voltage regulator helps prevent battery overcharging and undercharging while protecting sensitive electrical components from excessive voltage. Because charging system performance depends on the interaction between the regulator, rotor, stator, rectifier, and battery, replacing a faulty regulator is an important step in restoring alternator performance.
Common Signs Replacement Is Needed
Replace the voltage regulator if you notice:
- Battery overcharging
- Battery not charging
- Low charging voltage
- High charging voltage
- Battery warning light illuminated
- Intermittent charging problems
- Headlights that brighten or dim with engine speed
- Charging system failure during testing
- Voltage regulator failure discovered during alternator rebuilding
Installation Recommendations
Installation should be performed by a qualified technician or experienced alternator rebuilder. Before installing the new regulator, inspect the brushes, brush holder, slip rings, rotor, stator, rectifier, wiring, and electrical connections for signs of wear or damage.
Always verify connector configuration and mounting style before installation. After assembly, bench-test the alternator to confirm proper charging voltage and overall charging system performance.
While You're Rebuilding
Inspect other common wear components to help maximize charging system reliability:
Why Buy From RC Auto Electric?
RC Auto Electric specializes in alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of OEM and aftermarket electrical components backed by accurate cross-reference information to help simplify part identification and reduce ordering mistakes.
Disclaimer
Compatibility information is provided as a reference only. Manufacturing revisions, production changes, and previous rebuilding modifications may affect internal alternator components. Always compare the original part, connector configuration, mounting style, voltage specifications, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.
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