1987 Mustang Fuel Pump Relay Location
EDIT: Oops, I screwed the pooch on that one. You asked for a 1987 THUNDERBIRD.
On a 2.3 turbo thunderbird, and the most i know is there is a "pink, black" wire that is the main power, to find that, you access the trunk and bolted behind the seat is 2 metal boxes, undo those and you should be able to find the wire and follow it to the relay
The relay should be under the driver seat on the floor its a little black box with a plug on one end.
(copied from Answers.com)