How do I diagnose failure modes in a 1998 XK8

Question edited for clarity.
Question moved to model category.

This has to be one of the worst electrical manuals I have come across. Download it and Page 24 refers

https://www.manualsdir.com/manuals/132991/jaguar-xk8.html

Jaguar XK8 forum

https://www.jaguarforums.com/forum/xk8-xkr-x100-17/xk8-xkr-handbook-sets-manuals-1997-2006-faq-67827/

ABS

https://www.google.com/search?q=1998+jaguar+xk8+ABS+fuse

Ck here, there's one you canprint off for the glove box.
3d post down I believe...

https://www.jaguarforums.com/forum/xk8-xkr-x100-17/fuse-chart-98-xk8-112762/

Best to you

check the PNRD safe switch located on transmission

http://www.car-stuff.com/mmparts/jaguar-xk8/acc_cabin_filter.html bout half way down the page you will find the 98 xk8 ACC Cabin Filter

The definition for P1000 code is as follows:
OBD II Monitor Testing not complete
You may be experiencing ECM computer problems. Have it diagnosed by a certified ASE professional.

could just be a vacuum leak or the throttle plates are dirty

Seems likely it is just a transmission cable adjustment needed. Please see my whole note (not a musical whole note) above under Clarification...

I'd go to this site and read the info... http://www.europeantransmissions.com/Bulletin/DTC-jag/Jag/307-01.pdf

Best regards, Michael

I had the same problem on my XK8 and I figured out that due to the age, this could be a failure of the thermostat. The thermostat is a valve that is closed when engine is cool and opened when it is warm. Quite often for being old is does not operate properly and the coling liquid is being blocked in one part of the circuit. The temperatuire sensor starts the high fan mode that keeps on all time.
A way to check on that is to see the behaviour of the cooling fans. If the high cooling mode of fan only appear after a few miles nd keep on going from this point it is very lickely a problem a thermostat that has to be replaced. Just have to purchase one in any internet reseller and get your mechanical shop to replace it.

The key hole is located in the middle of the rear XK8 badge on the right rear.

I have a 97 xk8 , My car was Hit in the front ,Air bags out and want start. What can i do?