How to replace the alternator on a mercury cougar 2001?

SOURCE: where is the fuel filter

filter is just forward of the fuel tank on the passenger side of the car. It is relatively easy to replace as it has a hose clamp on either end attaching it between the line from the fuel tank and the line to the fuel injection system. Filter costs about $ 12.

SOURCE: 2001 Mercury Cougar, won't turn over

This will sound stupid but check to make sure all the bulbs, yes I said bulbs, as in brake and turn signals are the correct bulb. No kidding. I fought a problem like this in my shop for a week on a mustang. It had a wrong brake light bulb. Just a idea. See if it will start by jumping the 2 posts on the starter solenoid under the hood on the inner fender. It has two battery cables going to it. use 2 heavy screw drivers to do this. Do not tough the metal of teh screw drivers. The solenoid could also be bad.

SOURCE: alternator not charging on my 2000 mercury cougar

Trace the Hot Wire and Ground connections from the Alternator, to the:-
1. Battery.
2. The Power Box Positive Input terminal on the Main Fuse Box. Ditto the Ground as well.
3. Any sign of Wiring Degeneration on these Circuits. [Cracks, Breaks, Bad Joints, etc]
4. Groung cable links from the Battery to the Engine and Bodywork.
Whatever you look for, there has to be a completion of a Positive and Negative circuit, from the Heart of the system, which is the Battery, and ALL functions for the Vehicle.
I hope I have set you on the right track.
Regards, DT

SOURCE: removing alternator bolts on mercury cougar

There are 3 bolts. You'll need a LOT of socket extensions and a car hoist!
and a lot of time and patients.

But an even better idea is to just check the wire connections make sure they are well connected and no gaps on the female connectors if you suspect a bad alt.

SOURCE: engine diagram for 2001 mercury cougar

4 cyl or v 6?

2.5L V-6 with air conditioning built 01/99 onwards