I found the following thread most helpful. I have a 95 and couldn't see my warning lights when the top was down. Most frustrating to me was I couldn't see the parking brake light! I took SouthernGypsy's advice in this thread and ordered the bulbs he recommended and replaced them myself. It wasn't very hard. Now my warning lights are bright and I can see if my parking brake light is on even when my top is down and it's a sunny day!

Here's the link to the thread:
https://www.jaguarforums.com/forum/x...-124049/page8/

I used t-10 white led bulbs for the five instrument lights excellent results



























i used t-10 white led bulbs for the five instrument lights excellent results

...but being XJS dim, you can barely see them anyway... :icon_crackup:

Idiot lights on all the time?
Pull the two feed plugs in back one at a time. When the lights go out ckeck to see which lead on the plug is carrying 12vts. Troubleshoot from there

I found this interesting video on a XJS dash light improvement.