I've been checking relays and fuses to trouble shoot another issue. A while back I came across a nice PDF of the entire fuse layout. I printed it out, laminated it and attached it to the cover of the box in the boot. While I'm getting reacquainted with it I realize that #'s 13 AND 14 in the Boot Fuse Panel are listed as unused however I have a 10amp fuse in the #14 slot. I pulled it and there is a connection wired to the slot, where others listed as unused are void of any terminals in the box. Very possible I pulled a close but not exactly correct PDF, (I've checked referenced it and it looks good for the rest). Anyone know what extra #14 is for and what the correct fuse for it is.



















3

 

The wiring diagrams show it feeding the Navigation Control Module.

Do you have a nav system? BTW, it should be a 5 amp.

 

No Nav System, just the stock LCD's. Slot definitely has contacts in it, where slots on 13 are empty. I've even pulled the fuse with car on to see if I can ID

 

If anyone finds a correct fuse diagram for my 2001, let me know LOL. Seriously, came across same issue. Can't recall which fuse but diagram I had didn't match the box. Also, the diagram in my car manual (from a 2000 - though) didn't match that of another found on Internet... So I kind of gave up. I fixed many troubles simply by replacing the fuses. I check them time to time and as long they are all good, I'm good ;-)

 

Hi Blue_XJ8,

The 2001 Electrical Guide at the link below is not quite as convenient as a standard fuse diagram, but it's a lot more thorough, and will answer your fuse questions with a little study:

http://www.jagrepair.com/images/Auto.../jagxj2001.pdf


Cheers,

Don

 

I created 4 JPEG files that compare the fuses information in 2001 Jaguar XJ Electrical Guide to the 2001 Jaguar XJ Vehicle Care Handbook.

The Engine Management Fuse Box - fuse #10
Electrical Guide shows 10 amp and the Vehicle Care Handbook shows 5 amp fuse
Our 2001 Jaguar XJ8 has a 5 amp fuse in position #10 of the Engine Management Fuse box.
Also same situation with fuse #4 - 5 amp fuse in our 2001 Jaguar XJ8.

The Rear Left Hand Heelboard Fuse Box - fuse #16
Electrical Guide shows 10 amp and the Vehicle Care Handbook shows 5 amp fuse
Our 2001 Jaguar XJ8 has a 10 amp fuse in position #16 of the Rear Left Hand Heelboard fuse box.

Here are the JPEG files for the fuse boxes that were compared (to get larger view of images - right click on image then choose open link in new tab, then go to new tab and click on the image there):









Jim Lombardi

 

Jim,

Thanks for your ultra-thorough work (as always)! The discrepancies you uncovered are very curious. Do you have any thoughts on the reasons for the differences? For example, does your car lack an option that might explain the #10 fuse being downgraded to 5A, and is it equipped with an option that might explain the #16 fuse being upgraded? I haven't studied the schematic to see if this question makes any sense, I'm just thinking out loud.

Cheers,

Don

 

Don B
I cannot think of any reason that Electrical Guides fuse sizes are not the same as the Vehicle Care Handbook.

Here is what I found when I compared the other years - 1998/1999/2000:

1998/1999 XJ Electrical Guide shows Engine Management fuse #4 as 5 amps and fuse #10 as 5 amps.
2000 XJ Electrical Guide shows Engine Management fuse #4 as 10 amps and fuse #10 as 10 amps.

1998 /1999/2000 XJ Vehicle Care Handbook also shows Engine Management fuse #4 as 5 amps and fuse #10 as 5 amps

1998/1999/2000/ XJ Electrical Guide show Rear LH Heelboard fuse #16 as 10 amps, while the 1998/1999/2000 XJ Vehicle Care Handbook shows it as 5 amps.

Maybe I should change the fuse in our 2001 XJ - LH Heelboard fuse #16 to a 5 amp fuse?
The information in the Vehicle Care Handbook seems to be more accurate and consistent.

Jim Lombardi

 

If I recall well, my latest fuse replacement was a blown 5A fuse on the #4 (Engine control module) as referred to above as a ?. Happened when starting the car (which eventually didn't) and got every electronic display either light up or show me the entire dictionary of possible glitches. Would have shamed Back to the Future's DeLoreans LOL. Replaced the 5A with a higher one I had on hand (can't recall, but it's still there!) so wondering if by ~my2000 they figured out a 5A was too weak and prone to early blow hence replaced with a 10A? Just a thought


Cheers

 

Jim,

I would assume the Vehicle Care Handbook was finalized closer to the new model introduction than the Electrical Guides, and therefore may be more representative of the final manufacturing and engineering details. Of course, Benny Hill taught us what happens when we assume...


Brian,

That's as good an explanation as any!

Cheers,

Don

 

From what I have seen in aircraft manuals, contradictions are not unusual. Often two different departments will produce separate documents and when a change is made, the information isn't always communicated to both groups.