Scott Drake Instrument Cluster Voltage Regulator
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Scott Drake Instrument Cluster Voltage Regulators: Precision for Your Classic Mustang's Dash
Few electrical gremlins are more frustrating to a classic Mustang restorer than erratic, bouncing gauge readings. More often than not, the culprit is a worn-out instrument cluster voltage regulator — a small but critical component that keeps the voltage feeding your dash gauges stable and accurate. Scott Drake, the world's largest manufacturer and supplier of reproduction parts for classic Mustangs, offers purpose-built replacements that address both the reliability shortcomings of aging original units and the inaccuracies they cause over time.
What Makes Scott Drake's Voltage Regulators Stand Out
Scott Drake's instrument cluster voltage regulators are engineered with solid-state electronic circuitry, a significant upgrade over the original bimetallic strip design used from the factory. This solid-state construction reduces the supply voltage to a precise 5–6 volts, solving the electrical issues that commonly cause inaccurate readings across your fuel, temperature, and oil pressure gauges. The improved design is also built to remain reliable and accurate in varying environments, including high heat and humidity — conditions that are especially demanding on aging under-dash components in a vintage pony car.
Just as important, these regulators retain the original-style form factor, fitting right into the back of the gauge cluster for a clean, factory-correct installation. There are no modifications, no custom wiring, and no awkward workarounds — simply a drop-in replacement that looks and behaves as Ford intended, only better.
Coverage Across First-Generation Mustang Years
Scott Drake offers fitment-specific voltage regulators spanning the full breadth of the classic first-generation Mustang lineup. The B9MZ-10804-EADJ is designed for 1964–1966 Mustangs, while the C6DZ-10804-EADJ fits 1967–1968 models, and the C9AZ-10804-EADJ covers 1969–1973 Mustangs. Each part number corresponds directly to the original Ford part, reflecting the brand's commitment to OEM-level accuracy — a hallmark of a company that is also one of the largest manufacturers of Ford-licensed parts in the world.
Trusted by Restorers Worldwide
Since the late 1970s, Scott Drake has built its reputation on a simple promise: parts that fit correctly the first time, look factory-correct when installed, and perform at or above original specifications. Their instrument cluster voltage regulators are a textbook example of that philosophy — a component where an improved modern design quietly solves decades-old reliability problems without compromising the authenticity of your restoration. Whether you're building a concours-correct show car or a spirited weekend driver, accurate gauges matter, and Scott Drake delivers the hardware to make that happen.