I believe the fuel pump relay on later models ( like mine) isn’t a single unit but is part of a larger 4-relay module and that is located in the trunk by the antenna iirc
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Hi Larry, Now we might be getting somewhere. I do recall seeing something like what you describe tucked up in the corner between the harness from the battery and the radio antenna. I can’t recall exactly because I didn’t take them to be relays. The car is now on the mechanics lift to examine and trace fuel line pressure stem to stern. I will have to wait until monday to verify. Would you happen to know the part description and/or oem part number so I can source replacements? Thanks for this info
I don’t know the part number but the parts site should find it:
https://parts.jaguarlandroverclassic.com/parts/index/hierarchy/id/C01/brand/jaguar/
FWIW there’s another relay that governs fuel supply and this one is on the firewall - the oxygen sensor heater relay.
jagman66E - curious, what are the last 6 digits of your VIN?
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My car also has a fuel pump relay in the trunk. (3/1994) VIN: 703111
Last six digits are 699137.
This text is to say thanks to all who responded and to update my situation.
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The problem appears to be a physical failure within the fuel pump cannister which as been repaired but not installed yet.
A replacement was offered to me but I was told shipping might be prohibitive. I have found only
two the U.S., one @ $350 and one complete pump module for $600. Makes me wonder how high can shipping be? -
I did find a relay as in the picture sent me but I can’t verify what it is because it is tucked high up in the front right corner of the trunk, behind a small panel, and all I can see is the harness connector. I will wait until my repaired part is installed and working before proceeding further.
That is up to my mechanics work load. -
All the other suggestions have been tried and ruled out.
Again I thank everyone for their help.
Where are you located?
Rock Island Tennessee, zip 38581
I believed you mentioned you had a fuel pump canister. It that is true and you are willing to part with it how much would you require for it?
I am continuing to search f[r one in the event my repair fails. (as they usually do) 
Thanks for your reply.
Not me, I sold my spare tank years ago. I think it was Robin that had one in NZ?
Yep thats me, I’ll see if your short address gives me enough information to figure out the postage costs.
I would propably have to pick it up at the P.O.
at that zip code anyway. A package secure enough to ship overseas probably would not fit the mail box anyway. Thanks for checking.
It’s tough plastic. You could throw it down a flight of stairs and it wouldn’t be affected. Put it in a plastic bag and stick a stamp on it, job done. LOL
I think i’ll text Robin and tell him not to pay any attention to you 