Ford 2005 Grand Marquis Owner's Manual page 191

Power distribution box
The power distribution box is located in the engine compartment. The
power distribution box contains high-current fuses that protect your
vehicle's main electrical systems from overloads.
Always disconnect the battery before servicing high current
fuses.
To reduce risk of electrical shock, always replace the cover to
the Power Distribution Box before reconnecting the battery or
refilling fluid reservoirs.
If the battery has been disconnected and reconnected, refer to the
Battery section of the Maintenance and Specifications chapter.
503
304
502
501
24
303
23
22 20
302
21 19
The high-current fuses are coded as follows.
2005 Crown Victoria (cro)
Owners Guide (post-2002-fmt)
USA (fus)
Roadside Emergencies
118
204
209
206
602
203
117
208
205
116
202
601
115
201
207
18 16 14
301
17 15 13
114 110 106 102
113 109 105 101
112 108 104
111 107 103
12 10 8 6 4 2
11 9 7 5 3 1
191