Where is the ecu located in a 1999 Ford Transit diesel?

The exact location of the ECU (Engine Control Unit) in a 1999 Ford Transit diesel can vary slightly depending on the engine type and specific model variations. However, it's most commonly found under the driver's side dashboard, behind a panel. Sometimes it might be located under the bonnet (hood), but this is less common on that year's Transit.

To find it, you'll likely need to:

* Remove a section of the lower dashboard: There's usually a panel or cover that needs to be taken off to access the area behind the dashboard.

* Look for a fairly large, rectangular, black box: The ECU is usually securely mounted and may have wiring harnesses connected to it. It will have numerous connectors.

Before attempting to locate or work on the ECU: Disconnect the negative terminal of your battery to avoid any electrical shorts or damage. If you're unsure about any aspect of this, it's best to consult a Ford Transit mechanic or a qualified auto electrician. Incorrectly handling the ECU can cause serious damage to your vehicle.