Picked up an 05 XJR with a host of issues. As I work through them all it's apparent that documented fixes on these are somewhat spotty. Working on this vehicle getting it road worthy after it sat in storage for 10 years there a few things I've found little to no information on. Here's one that I hope helps others,.......

SYMPTOMS
Driver power seat inoperative.
SRS/Air bag light on.
Rear passenger door ajar warning
Rear passenger door power window inoperative
Key fob lock button double beep won't lock

*Note: All symptoms were present in my case, not all might be present for yours , based on time to eliminate this as a possible cause is minimal and should not be discounted There are several ground wires running to the point G13 I believe. It's highly possible one or more could corrode. Any diagnostician worth his weight should be able to figure the loss of ground as a source of the problem.

FAULT
Ground under driver's seat.

REPAIR STEPS
1. I should say disconnect battery but given repair I didn't .

2. Unbolt two E12 six point bolts at front rail of seat.




3. Remove two rear plastic covers concealing rear mounting bolts, remove two 15 mm hex bolts.



4. Tilt seat back to access seat wiring harness.



5. Trace seat wiring harness where it enters into carpet.




6. Pull back carpet and grimace at corrosion at what left of ground point!!!



7. Clean up corrosion at ground point. The stud was non existent and a stud close to the original was available Paint was removed from stud to create a clean ground point.

8.Clean wiring harness ground wires terminals if salvageable. One group of ground wires at ring terminal was decent and salvageable after a thorough cleaning, the other crumbled and had to be replaced . Corroded wire ends were removed and a new copper terminal installed.


9.To use the closest ground point a suitable ground surface was created using a copper hex nut. Hex nut was drilled out to fit around base of stud and pressed into place.

10. Install ring terminals to stud. If available use aluminum hardware and terminals. Star washer and a heavy dose of anti seize. If available use dolphinite to prevent further galvanic corrosion . Or cover entire connection with silicone to seal from elements and further corrosion. Beat would be to seal connection with polysulphide. Didn't have any and it stinks untile set.


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11. Reinstall seat, make sure to locate pins at front of seat in holes. Reinstall hardware.


Hope this helps anyone having similar issues. It's a simple repair and solves all my issues.

 

Pardon the odd spelling error.

 

How does this happen in the interior of a car???

 

You have three materials being used that don't get a long with each other and should be treated and sealed to avoid this. Galvanic corrosion is an issue in many applications if not addressed when systems are designed and installed.The ground is at a low point in the vehicle, humidity, moisture from wet footwear and in this case being in Canada snow will all introduce another element to hurry this along. The ground point also is right near a vent at floor level that will also introduce moisture into the area.

 

Hi Jakeuar,
When I saw the corrosion on the seat mounting rail I wondered, is this a flood-damaged car?
Humidity, snow, Canada etc, should not cause corrosion in such places. Then the disintegration of the earth point as well. I would look at all the earth points, especially those in the floor. It would probably pay to remove all the carpet and check what's under there.
Great job finding and repairing it.

Pete M

 

Hello Pete,
Thanks for the advice, here in Canada in the area I reside there is a heavy use of road salt during the winter. You'd be surprised at the damage it causes when its tracked in to the vehicle, mixed with snow and ice.. I can send you pics of carpets in vehicles where the road salt build up is taking on a life of its own and seat rail mounts are rotting off the floorpan.. The vehicle was definitely not a flood damaged vehicle. The car is in amazing condition and came with a host of service records. I know the family who owned it previously from new. I've been wrenching on Land Rovers for the passed 20 years and I can say any aluminum bodied Rovers suffered from the same issues where dissimilar metals attacked each other, remember you have aluminum, steel and copper converging to produce an unholy unstable alliance.

 

“remember you have aluminum, steel and copper converging to produce an unholy unstable alliance.”

and electrical current…

 

Good ole electrolytic corrosion!!!