Item# 51A-10505

VOLTAGE REGULATOR - 39-55 PASS/MERC/PU 6V POSITIVE GROUND

Regular price $69.95 / each
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SPECIFICATIONS

Note Good quality replacement.
Additional Information 51A-10505, for 6-volt, cover color might be black, blue or silver.

COMPATIBILITY

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Year
Model
Details
1939, 1940, 1941, 1942, 1946, 1947, 1948, 1949, 1950, 1951 Convertible
1946, 1947, 1948 Convertible Sportsman
1952, 1953, 1954 Convertible Sunliner
1939 Convertible Sedan
1949 Coupe Business
1951 Coupe Custom
1949 Coupe Custom Club
1950 Coupe Custom Deluxe
1939, 1940, 1941, 1942, 1946, 1947, 1948, 1950, 1951 Coupe Deluxe
1942 Coupe Special
1939, 1940 Coupe Standard
1941, 1942, 1946, 1947, 1948 Coupe Super Deluxe
1954 Crestline Sedan, 4 Door
1952, 1954 Customline Club Coupe
1953 Customline Club Sedan
1952, 1953, 1954, 1955 Customline Sedan, 2 Door
1952, 1953, 1954, 1955 Customline Sedan, 4 Door
1955 Fairlane Club Sedan, 2 Door
1955 Fairlane Convertible
1955 Fairlane Crown Victoria
1955 Fairlane Crown Victoria, Glass Top
1955 Fairlane Town Sedan, 4 Door
1955 Fairlane Victoria
1952, 1953, 1954 Mainline Business Coupe
1952, 1953, 1954, 1955 Mainline Sedan, 2 Door
1952, 1953, 1954, 1955 Mainline Sedan, 4 Door
1939, 1940, 1941, 1942, 1946, 1947, 1948, 1949, 1950, 1951 Mercury Convertible
1940 Mercury Convertible, Sedan
1939, 1940, 1941, 1942, 1946, 1947, 1948, 1949, 1950, 1951 Mercury Coupe
1952, 1953 Mercury Hardtop, 2 Door, Sport Coupe
1939, 1940, 1941, 1942, 1946, 1947, 1948, 1952, 1953 Mercury Sedan, 2 Door
1939, 1940, 1941, 1942, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953 Mercury Sedan, 4 Door
1946, 1947 Mercury Sportsman
1955 Mercury Custom Hardtop, 2 Door, Sport Coupe
1955 Mercury Custom Sedan, 2 Door
1955 Mercury Custom Sedan, 4 Door
1954 Mercury Customline Hardtop, 2 Door, Sport Coupe
1954 Mercury Customline Sedan, 2 Door
1954 Mercury Customline Sedan, 4 Door
1955 Mercury Montclair Convertible
1955 Mercury Montclair Hardtop, 2 Door
1955 Mercury Montclair Sedan, 4 Door
1952, 1953, 1954 Mercury Monterey Convertible
1950 Mercury Monterey Coupe
1952, 1953, 1954, 1955 Mercury Monterey Hardtop, 2 Door
1952, 1953, 1954, 1955 Mercury Monterey Sedan, 4 Door
1939, 1940, 1941, 1942, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955 Panel
1939, 1940, 1941, 1942, 1946, 1947 Pick-Up
1939, 1940, 1941, 1942, 1946, 1947 Pick-Up 1 Ton
1948, 1949, 1950, 1951, 1952 Pick-Up F-1
1953, 1954, 1955 Pick-Up F-100
1948, 1949, 1950, 1951, 1952 Pick-Up F-2
1953, 1954, 1955 Pick-Up F-250
1948, 1949, 1950, 1951, 1952 Pick-Up F-3
1953, 1954, 1955 Pick-Up F-350
1949 Sedan 2 Door
1949 Sedan 4 Door
1950, 1951 Sedan Crestliner, 2 Door
1950 Sedan Custom Deluxe, 2 Door
1950 Sedan Custom Deluxe, 4 Door
1949, 1951 Sedan Custom, 2 Door
1949, 1951 Sedan Custom, 4 Door
1939, 1940, 1941, 1942, 1946, 1947, 1948, 1950, 1951 Sedan Deluxe, 2 Door
1939, 1940, 1941, 1942, 1946, 1947, 1950, 1951 Sedan Deluxe, 4 Door
1942 Sedan Special, 2 Door
1942 Sedan Special, 4 Door
1939, 1940 Sedan Standard, 2 Door
1939, 1940 Sedan Standard, 4 Door
1941, 1942, 1946, 1947, 1948 Sedan Super Deluxe, 2 Door
1941, 1942, 1946, 1947, 1948 Sedan Super Deluxe, 4 Door
1941, 1942, 1946, 1947, 1948 Sedan Delivery
1952, 1953, 1954, 1955 Sedan Delivery Courier
1940 Sedan Delivery Deluxe
1939 Sedan Delivery Standard
1955 Thunderbird
1951, 1952, 1953, 1954 Victoria Hardtop, 2 Door
1954 Victoria Skyliner, Glass Top
1952, 1953, 1954, 1955 Wagon Country Sedan, 4 Door
1952, 1953, 1954, 1955 Wagon Country Squire, 4 Door
1955 Wagon Mercury Custom Wagon, 4 Door
1954, 1955 Wagon Mercury Monterey Wagon, 4 Door
1952, 1953 Wagon Mercury Wagon, 4 Door
1952, 1953, 1954, 1955 Wagon Ranch Wagon, 2 Door
1949, 1950 Woodie Wagon 2 Door
1951 Woodie Wagon Country Squire, 2 Door
1939, 1940, 1941 Woodie Wagon Deluxe, 4 Door
1949, 1950, 1951 Woodie Wagon Mercury Wagon, 2 Door
1941, 1942, 1946, 1947, 1948 Woodie Wagon Mercury Wagon, 4 Door
1939, 1940 Woodie Wagon Standard, 4 Door
1941, 1942, 1946, 1947, 1948 Woodie Wagon Super Deluxe, 4 Door

FAQs

Will this voltage regulator fit my 1951 Ford Custom Deluxe?

Yes, this part is designed to fit a wide range of models including the 1951 Custom Deluxe and other Ford sedans, coupes, and convertibles from 1939 to 1955. Always confirm your current system voltage (6V or 12V) for best results.

Is this regulator compatible with both 6V and 12V systems?

This unit is designed to match original factory specs for either 6V or 12V systems depending on your vehicle’s configuration. Please check your wiring and generator setup before ordering.

Do I need to modify my wiring or mounting bracket to install this?

Not at all. This is a direct-fit replacement and uses the original mounting points and connections—no drilling or rewiring required for factory-spec vehicles.

Does it include the proper finish for show-quality restoration?

Yes, the housing is finished to closely match OEM appearance, making it ideal for period-correct engine bays.

What are signs my voltage regulator needs replacing?

If your lights flicker, battery won’t hold charge, or you notice overcharging or erratic voltage readings, your regulator may be failing. Replacing it with a quality reproduction like this one can restore stable charging.

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