Clarify....Are you talking about an AMP for a Stereo?
The stock amp in a 1990 Mercury Grand Marquis is in the dash behind the radio.
you dont
On a 1999 Mercury Grand Marquis : In the passenger compartment fuse panel : ( # 16 is a yellow color 20 amp fuse for the cigarette lighter )
According to the 1999 Mercury Grand Marquis Owner Guide : # 16 is a ( 20 amp fuse ) for the cigarette lighter
In a 1997 Mercury Grand Marquis : ( # 16 is a 20 amp fuse for the cigarette lighter and 4 way flashers ) * under the dash
I have a Grand Marquis GS,it had no Amp installed.I bought a new JVC stereo that was on display for next to nothing,allthough it took some time,and i had to but a new harness to fit the stereo.But if you don`t have the time or know how i would but a stereo and if you have a Best Buy near you have them install it for you for around $50.00 plus the harness at $20.00.Good Luck. I just went through the same thing the factory amp input signal operates at a lower level than normal radios so if you bypass the amp you could destroy the factory speakers, so you have a decison to replace all the speakers with the special wiring harness, or buy the PAC-2 from cruchfield.com. in which lowers the the signal of the aftermarket radio to work with the factory amp & speakers. Please note it is still going sound the same because you will be still using the factory set up. I just did it to my 1987 mercury grand marquis and it works fine.
Fuse # 16 is a 20 amp fuse for the cigarette lighter
( # 16 ) is a 20 amp fuse for the cigarette lighter and OBD II in a 2007 Mercury Grand Marquis ( in the fuse panel below and to the left of the steering wheel by the brake pedal )
On a 1998 Mercury Grand Marquis : In the fuse panel under the dash : ( # 16 is a 20 amp fuse for the cigarette lighter and emergency flasher relay )
On a 1999 Mercury Grand Marquis : In the fuse panel below and to the left of the steering wheel , by the brake pedal ( it has a cover on it ) ( # 16 is a 20 amp fuse for the cigar lighter )
In a 2000 Mercury Grand Marquis fuse ( # 16 ) is a 20 amp fuse for the cigarette lighter ( in the fuse panel below and to the left of the steering wheel by the brake pedal , the panel has a cover on it )
yes , you need the converter from high to low, found at walmart, connect to speakers, if have factory amp install before the amp