1992-1996 Jaguar XJS Wiper Switch: Diagnosing and Solving the Common Wiper Parking Fault
This guide covers the common failure symptoms, part numbers, and replacement tips for the right-hand combination switch on facelift Jaguar XJS models.
- The most common failure is the wipers not 'parking' correctly, which is almost always caused by the switch, not the motor.
- This is the right-hand switch for facelift models (approx. 1992-1996). The primary part number to look for is LHC6460AA.
- Replacement is a simple DIY job, requiring only basic tools to remove the steering column covers.
- A used OEM part is the most cost-effective solution, but verify the part number and inspect it carefully before purchase.
Symptoms of a Failing Jaguar XJS Wiper Switch
When the wiper switch on a facelift-era XJS begins to fail, it can cause several distinct problems. While a complete failure is possible, symptoms are often intermittent at first.
- Wipers Do Not Park Correctly: This is the most common and well-documented issue for the XJS. When you turn the wipers off, they may stop immediately in the middle of the windshield instead of returning to their resting position at the base of the glass. This is often caused by a distorted internal contact board inside the switch housing.
- Intermittent or No Operation: The wipers may work sporadically, or not at all. You might find that only certain speeds work, or that you have to jiggle the stalk to get a response.
- Washer Function Fails: The push-button or function to activate the windshield washer jets may stop working, even if the wipers themselves still operate.
- Wipers Activate Randomly: In less common cases, a short inside the switch could cause the wipers to turn on by themselves, even if the switch is in the 'off' position.
Known Issues Specific to the Facelift XJS
The most notorious problem with this switch is an internal design flaw related to the wiper parking function. Forum archives are filled with owner experiences detailing this specific failure. Inside the switch stalk, a plastic contact board is responsible for sending the signal that tells the wiper motor to complete its cycle and 'park'. Over time, this board can warp or deform. This prevents the electrical contacts from aligning correctly, interrupting the park signal. Interestingly, this issue has been reported even on brand-new, new-old-stock (NOS) switches that have been sitting in a box for years, suggesting the plastic can deform even without use. Some owners have successfully repaired the switch by disassembling it and reinforcing the warped plastic board, though this is a delicate procedure.
Diagnosing the Problem
Before condemning the switch, perform a few simple checks:
- Check the Fuses: A blown fuse is the simplest possible cause. On these models, the fuse panel can also suffer from corrosion on the fuse holders, preventing good contact. Check for power on both sides of the relevant fuse with the ignition on.
- Test All Functions: Systematically test every function on the stalk. If the wipers don't work but the washer jet function on the same stalk does, it points towards a partial failure within the switch. If multiple, unrelated systems controlled by the switch are failing, the switch is the most likely culprit.
- The 'Pressure Test': If your wipers fail to park, try applying gentle upward or downward pressure on the stalk as they are running and then turn them off. If this allows them to park correctly, it almost certainly confirms the internal contact board has deformed.
Pro Tip: Don't immediately assume the wiper motor is bad. While wiper motors can fail, the switch is a more common point of failure for symptoms like incorrect parking or intermittent operation on the XJS. Testing the motor directly with a power source can rule it out if you suspect it.
Buying a Used Combination Switch for Your 1992-1996 XJS
Given the high cost of new OEM parts, a used switch is often the most practical solution. Here’s what to look for to ensure you get a good part.
- Verify the Part Number: This is the most critical step. The facelift XJS (from VIN 179737 onwards, roughly 1991/1992-1996) uses part number LHC6460AA. Earlier cars used different wiper systems and switches, so a part from an older XJS will not work. Always match your original part number.
- Physical Inspection: Check the plastic stalk for any cracks or stress marks. Ensure all the white lettering and symbols are clear and not worn away, as this can indicate very high usage.
- Connector Pins: Inspect the electrical connector and its pins. Look for any signs of corrosion, bent pins, or melting plastic that could indicate a past electrical issue.
- Ask About Testing: While not always possible, ask the seller if the switch was tested before removal. Specifically, ask if the wiper parking function worked correctly. Due to the known internal flaw, even a used switch carries some risk of having this problem.
- Why Used OEM is a Good Choice: For a component like this, a genuine used Jaguar part is often superior to non-existent or poor-quality aftermarket alternatives. The fit, feel, and electrical logic are guaranteed to be correct for the vehicle, which is crucial in a complex electrical system.
Replacement Overview & Difficulty
Replacing the wiper switch is a straightforward job that most DIY mechanics can handle with basic tools.
- Difficulty: 2 out of 5
- Estimated Time: 0.5 - 1 hour
The basic process involves removing the plastic shrouds around the steering column. These are typically held in place by a few Phillips head screws accessed from underneath. Once the lower and upper shrouds are separated and removed, the combination switch is fully exposed. It is secured to the column with screws and has a single electrical harness connector. Simply unscrew the old switch, disconnect the wiring, and install the new one in its place before reassembling the column covers.
Cost Comparison
| Part Type | Estimated Cost |
|---|---|
| New OEM | $390 - $450 |
| New Aftermarket | Not generally available |
| Used OEM | $60 - $250 |
| Shop Labor | $100 - $180 |
OEM Part Numbers
This article focuses on the right-hand (wiper) switch for the facelift Jaguar XJS, which began around 1991/1992. Always confirm the part number from your specific vehicle before ordering.
| Part Number | Vehicle Fitment Notes |
|---|---|
| LHC6460AA | Fits facelift XJS models from approx. 1992-1996. This is the most common number for the specified vehicles. |
| DAC10517 | Superseded or alternative number for the facelift era. |
| DAC6320 | Listed as a genuine part for facelift XJS models. |
| DAC6316 | Associated with facelift models. |
Warning: Part numbers for pre-facelift cars (e.g., AEU1734, AEU2527) are not compatible with 1992-1996 models due to different wiper systems. Always match your VIN range and original part number.
Frequently Asked Questions (FAQ)
Can I fix my old wiper switch instead of replacing it?
Maybe. If the issue is the common wiper parking fault, some skilled owners have successfully disassembled the switch, cleaned the old grease, and reinforced the warped internal contact board. However, the switch is typically riveted or clipped together and contains small springs and contacts that are easy to lose. For most people, replacement is the more reliable option.
Why do my wipers stop in the middle of the screen?
This is the classic symptom of a failing combination switch on a Jaguar XJS. It happens because a deformed contact plate inside the switch fails to send the 'park' signal to the wiper motor when you turn the stalk to the off position. The motor simply stops where it is.
Are the left (turn signal) and right (wiper) switches interchangeable?
No. They are separate parts with completely different functions and internal wiring. The left stalk controls turn signals and headlights, while the right stalk controls the wipers and washers.
Is any programming required after installing a new switch?
No. The combination switch is a direct, plug-and-play component. No special programming or calibration is needed after installation.
Technical Specifications
OEM Part Numbers: LHC6460AA DAC10517 DAC6316 DAC6320
Controls front windshield wiper (intermittent, low, high speeds) and washer functions. Mounts to the right side of the steering column.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Jaguar XJS: