1987 Lamps Info.

1987 HEADLAMPS 49

Figure 1:

HOW THE CIRCUIT WORKS

HEADLAMPS

Voltage is applied to the Main Light Switch at all times with the Main Light Switch in HEAD, voltage is applied to the dimmer switch. With the dimmer switch in LO, voltage is applied to the LO filaments of the Headlamps. With the dimmer switch in HI, voltage is applied to the HI filaments of the Headlamps and to the High Beam Indicator.

LAMPS ON WARNING

With the Main Light Switch in PARK or HEAD, voltage is applied to the lights on input of the Warning Chime or Buzzer Chime. With the key out of the Ignition Switch, the Key Warning Switch is open and the Key Warning Switch input of the Warning Chime or Buzzer Chime is not grounded. The warning sounds.





50 AUTOMATIC LAMPS/DELAYED EXIT 1987





1987 AUTOMATIC LAMPS/DELAYED EXIT 51


52 AUTOMATIC LAMPS/DELAYED EXIT 1987


HOW THE CIRCUIT WORKS

The Automatic Lamps/Delayed Exit (AUTOLAMP) circuit automatically turns Headlamps and Exterior Lamps on and off.

Automatic Lamps

A Light Sensor/Amplifier mounted on the top left dash panel senses darkness. As resistance of the photocell increases to a set value, the Light Sensor/Amplifier applies power to the Autolamp Relay, which turns on the lamps.

A Lamps On adjusting screw sets the automatic lamps for EARLY or LATE. If it is necessary to have the lamps turn on earlier than the factory setting, turn the LAMPS ON set screw toward EARLY. Turn toward LATE for a later turn-on.

Delayed Exit

The Delayed Exit system is turned on by moving the AUTO dial (on the Autolamp Switch) away from OFF position. Turning the dial toward MAX increases the resistance, increasing the length of time the lamps will stay on after the Ignition Switch is turned OFF.


COMPONENT LOCATION Page-
Figure

Autolamp Relay # 1 Attached to top rear of shake brace 53-1
Autolamp Relay # 2 Attached to top rear of shake brace 53-1
Ground G200 Near alternator regulator 42-4
Headlamp Dimmer Relay Attached to top rear of shake brace
Light Sensor/Amplifier Attached to top underside of I/P 53-1
Main Light Switch Lower LH front corner of I/P 49-1


Refer to pages 175 through 177 for Connectors and Splice Descriptions and Locations.


TROUBLESHOOTING HINTS

AUTOMATIC LAMPS DO NOT WORK

^ Check manual operation of Headlamps.
^ Check Fuse 18 and power at Light Sensor/Amplifier.

^ Check for good ground at G200.

^ Check Autolamp Relays and Light Sensor/Amplifier.


DELAYED EXIT DOES NOT WORK

^ Check manual operation of Headlamps.

^ Check Fuse 18 and power at C295.

^ Check for good ground at G200.

^ Check Autolamp Time Control Switch.

Figure 1 - Instrument Panel Wiring (TAURUS) (Autolamps):

1987 AUTOMATIC LAMPS/DELAYED EXIT 53

Figure 1 - Instrument Panel Wiring (Sable):

54 AUTOMATIC LAMPS/DELAYED EXIT 1987