This has been posted in the official feedback thread for ECML and a support ticket has also been issued. However, also posted here for visibility. The following configuration should be applied for units working in multiple: In the leading unit, headlights should be on at the front. The rear lights should be off. In the trailing unit, tail lights should be on at the rear. The front lights should be off. The lights in the middle (ie rear of the leading and front of the trailing unit) should not be turned on when working in multiple. Point 3 applies to the 801/1. Upon entering the cabs of both units, the Headlight Control Switch (this controls the headlights and taillights) is set to off, but upon inspection, this is clearly not the case. This is an issue affecting AI and player controlled services where the 801/1 runs in multiple. It is unique to the 801/1, as the 801/2 doesn't run in multiple with any other units.
