where the alternator is located
Try looking above the steering column to the left almost up by the windshield. You will see the back of the ECU bolted in its holder and the wiring connector is to it from outside the firewall. If that doesn't find it then look around under the hood for a major group of wires (the wiring harness) connected by a 7x1/2 rectangular block bolted to a 8x6 plain metal (looks like bare sheet metal) box with heat sinks located on it.
How to find out u battery light is staying on
Looking for a Used Cougar in your area?
CarGurus has 159 nationwide Cougar listings and the tools to find you a great deal.
Search Mercury Cougar Questions
Mercury Cougar Experts