Mitsubishi MOTORS 3000GT Bedienungsanleitung Seite 728

14. HEADLIGHT ACTIVATION CIRCUIT
Description of operation
The ECU transistor is turned ON if the vehicles
door, etc. are opened without use of the key. This
energizes the headlight relay to active the headlight.
CHASSIS ELECTRICAL - Theft-alarm System
TSB Revision
Checking the headlight activation circuit (Disconnect
the connector of the ECU, then short-circuit terminal
connector 2, and activate the headlight relay.)