# Interior light switch, remove and install

Switch is located on the forward pillar of each door. |
Open door and remove single Phillips screw from switch |
Slide switch out of pillar and disconnect wiring. Switch is grounded to body. When door is opened, connection is made from body ground to brown/???? wire (second color varies with each door, yellow, shown, is for front left door.) This ground signal is sent to the interior light timer control relay, which is located below the front left speaker, alongside the central locking control unit. See picture below. Green wire pictured is not used. |
| To access timer relay, remove left front speaker , lift out plastic cover below speaker (white arrow) and remove two Phillips screws (green arrows). Lift timer and central locking control unit assembly out of pillar. Ensure ignition is off before moving central locking control unit. |

E30 M3 Repair Manual V2.7. Copyright ©1999-2001 Koala Motorsport & Brett Anderson