Interior Lighting

Interior Lighting With/Without Time Delay
For certain markets/models, the interior lighting circuit incorporates relay 151 which gives a time delay.

The lighting circuit and the time-delay relay are supplied with current via fuse 16. The relay is also supplied with current from the +15 circuit.

The interior lighting comes on when a door is opened. Door switch 54 then closes and relay 151 operates since its connection (T) is grounded. When the door is closed, the circuit is broken. The interior lighting remains on, however, because the relay's time-delay circuit maintains the ground connection across contacts T and 31.

The time delay is about 15 seconds, but will be interrupted if the ignition switch is turned to the Drive position. Relay connections 15 and 30 will then both be supplied with positive voltage, at which point the relay releases and the ground circuit across contacts T and 31 is broken.