Where is the ecm on a 1999 Merc Cougar V6?

The ECM (Engine Control Module), also sometimes called the PCM (Powertrain Control Module), on a 1999 Mercury Cougar V6 is typically located under the hood, near the firewall, often on the passenger side. However, the exact location can vary slightly depending on options and specific trim level.

To be sure, it's best to:

1. Consult your owner's manual: This is the most reliable source for the location of your vehicle's ECM.

2. Look for a large, rectangular black box with numerous connectors: This is a common characteristic of ECMs.

3. Check online forums: Search for "1999 Mercury Cougar V6 ECM location" on forums dedicated to Mercury Cougars. Someone may have pictures or more precise instructions.

Remember to disconnect the negative battery terminal before working near any electrical components.