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Heavy-Duty Adjustable Voltage Regulator – Chrysler / Dodge / Plymouth / Jeep (1970–1987)External solid-state regulator • Red plug • A-Circuit • 14V system (set 14.3V) • Fully encapsulated & moisture resistant✔️ 100% New Transpo HD version (not reman)✔️ Adjustable set point – tuned performance✔️ Fully encapsulated solid-state design✔️ Fits Round Back / Square Back / Rev. Square Back (ER/IF)Item Electronic Voltage Regulator (HD)ConnectorRed PlugVoltage / Circuit12V System • A-Circuit • 14.3V set (adjustable)PolarityNegative 1970–1987 with Round Back, Square Back & Revised Square Back alternators (ER/IF)FeaturesSolid-state, fully encapsulated, moisture resistant, adjustable voltage, heavy-duty componentsDescription
Premium heavy-dutyAftermarketexternal voltage regulator engineered for classic Chrysler, Dodge, Plymouth, and Jeep applications (1970–1987). This HD Transpo build uses a fully encapsulated, solid-state design for superior durability and moisture protection. Red plug connector, A-circuit, preset ~14.3V with an adjustable trim for fine tuning.
- Direct plug-in replacement; no wiring modifications on OE-style systems
- Stable output for added electrical loads and modern accessories
- Ideal for restorations and reliable daily street use
Replaces OEM & Cross-ReferenceChrysler:3438150, 3755850, 3755960, 3874520, 4091050, 4111990, 5234625, CH-537, CH-543, CH-544, CH-545Delco:C-603, 10463282, Nos:7015, 7024, 7505, 7509, 7521, 7537, 7546, 7549Applications
- Preset ~14.3V. For fine tuning, use a quality voltmeter across the battery at ~1,500–2,000 RPM with lights/accessories on; adjust the regulator trimmer in small increments.
- Ensure clean grounds and good battery cables; poor grounds can cause erratic charging.
- Designed for A-circuit (field to power) alternators with ER/IF Chrysler round/square-back types.
Package Includes
- 1 × Heavy-Duty Adjustable External Voltage Regulator (Red Plug) –Aftermarket
Please compare connector style and part numbers to your original. Message us with your year/make/model/engine for quick compatibility help.
