You may have a short in wiring to fuel pump. Try this! remove the wires from fuel pump, then turn key to start the car briefly. If the fuse does not blow, its likely the fuel pump is drawing to much current and blowing the fuse. God-Bless!
Disconnect the fuel pump at the fuel tank, if the short stops the fuel pump is defective not the wiring harness to it, a shorted fuel pump is much more common than shorted wiring to the pump .
SOURCE: What is the llocation of a fuel pump for a1988 buick park avenue
Commonly submerged in the fuel tank. Some require the removal of the bottom rear seat, others need entire tank dropped to access.
If memory serves, you will need to drop the tank to access on the P.Ave.
Save yourself some time and pop off the rear seat just to be sure.
SOURCE: change fuel pump on 1994 buick park avenue
Drain all gas as much as possible for weight reasons, Unhook fuel lines, unhook electrical connections, and ground connections, filler tube, and straps, then tank will drop out. Remove retaining ring on sending unit remove unit from tank taking note how it comes out because its got to go back in the same way it came out, chg. pump on sending unit there is one electrical plug, reinstall unit in tank with retaining ring, assemble in reverse order.
SOURCE: 1991 buick park avenue will not run fuel pump is good and replaced the fuel filter
http://www.fixya.com/cars/t1810766-1991_buick_park_avenue_stop_running
Check out this link. It may help you with your problem.
SOURCE: FUSE IDENTIFICATION FOR 97 BUICK PARK AVENUE
Several Fuse Panel locations there; all fuse's description can find it in 1997 Buick Park Avenue Owners Manual (page 331 and next).
Hope this help (remember comment and rated this post) TY for using Fixya.
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