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Standard Ignition VR-425 Charging System Voltage Regulator
| Brand | Standard Ignition VR-425 |
|---|---|
| Connector Gender | No connector |
| Dimensions (mm) | 60.96 x 32.258 x 13.97 |
| Dimensions - Inches | 2.4 x 1.27 x 0.55 |
| Hardware Included | No |
| Instructions Included | No |
| Mounting Bracket(s) Included | No |
| Mounting Location | Alternator |
| Terminal Gender | Male |
| Terminal Quantity | 2 |
| Terminal Type | Eye ring |
| Voltage | 12 |
| Fits | Jaguar and Land Rover · 25 vehicles |
Voltage regulation. Keeps a 12-volt charging system operating consistently.
Alternator-mounted design. Built for direct integration with the charging system.
Eye-ring terminals. Two male terminals provide a secure electrical connection.
Cross-references Standard Ignition VR-425, AEU2750 and R977 for the same application. See all 6.
Charging System Voltage Regulator for Lucas Applications
Standard Ignition VR-425 is a 12-volt charging system voltage regulator for alternator-mounted applications. It uses a 2-terminal eye ring connection layout with male terminals and no separate connector, making it a direct-fit electrical service part for select Jaguar and Land Rover charging systems.
Key Features
- 12-volt charging system voltage regulator
- Alternator mounting location
- 2.4 x 1.27 x 0.55 in. housing dimensions
- Male terminals with eye ring terminal type
- 2-terminal design with no connector
- No hardware, instructions, or mounting brackets included
Detailed Description
The Standard Ignition VR-425 voltage regulator is built for alternator-based charging systems that use a Lucas-style configuration. It is listed for 1981-1987 Jaguar XJ6, 1981-1986 Jaguar XJS, 1987-1992 Jaguar XJS, and 1987-1992 Land Rover Range Rover applications. If you are servicing a Jaguar XJS charging issue or replacing a regulator on a Land Rover Range Rover, VR-425 provides the specified electrical interface and mounting format for those vehicles.
This part cross-references Standard Ignition VR-425 for the same application.
Common Problems It Can Address
- Battery warning light staying on after startup
- Charging voltage that is too low or too high
- Intermittent alternator output
- Dim lights caused by unstable system voltage
- Charging system faults traced to the regulator
Installation Notes and Tips
- Verify alternator mounting and terminal style before installation.
- Confirm the vehicle uses a Lucas charging system and a 12-volt regulator.
- Inspect the alternator, wiring, and battery condition during replacement.
- Match the eye ring terminals and 2-terminal layout to the original unit.
- Follow the vehicle service manual for charging system testing after installation.
Quality Assurance
Standard Ignition supplies electrical replacement parts for charging and starting system service. VR-425 is built to match the listed application requirements for fitment and electrical configuration.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1992 | Jaguar | XJS | — | — | N/A | Lucas |
| 1992 | Land Rover | Range Rover | 3.9L | V8 | N/A | — |
| 1991 | Jaguar | XJS | — | — | N/A | Lucas |
| 1991 | Land Rover | Range Rover | 3.9L | V8 | N/A | — |
| 1990 | Jaguar | XJS | — | — | N/A | Lucas |
| 1990 | Land Rover | Range Rover | 3.9L | V8 | N/A | — |
| 1989 | Jaguar | XJS | — | — | N/A | Lucas |
| 1989 | Land Rover | Range Rover | 3.9L | V8 | N/A | — |
| 1988 | Jaguar | XJS | — | — | N/A | Lucas |
| 1988 | Land Rover | Range Rover | 3.5L | V8 | N/A | — |
| 1987 | Jaguar | XJ6 | — | — | N/A | — |
| 1987 | Jaguar | XJS | — | — | N/A | Lucas |
| 1987 | Land Rover | Range Rover | 3.5L | V8 | N/A | — |
| 1986 | Jaguar | XJ6 | — | — | N/A | — |
| 1986 | Jaguar | XJS | — | — | N/A | — |
| 1985 | Jaguar | XJ6 | — | — | N/A | — |
| 1985 | Jaguar | XJS | — | — | N/A | — |
| 1984 | Jaguar | XJ6 | — | — | N/A | — |
| 1984 | Jaguar | XJS | — | — | N/A | — |
| 1983 | Jaguar | XJ6 | — | — | N/A | — |
| 1983 | Jaguar | XJS | — | — | N/A | — |
| 1982 | Jaguar | XJ6 | — | — | N/A | — |
| 1982 | Jaguar | XJS | — | — | N/A | — |
| 1981 | Jaguar | XJ6 | — | — | N/A | — |
| 1981 | Jaguar | XJS | — | — | N/A | — |
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