1. AUTOMATIC HEADLIGHTS (ON/OFF WITH DELAY) CHAPTER 13 CLASSROOM 408 TO 411 LAB 458 TO 465

2. SYSTEM OPERATION n ALLOWS HEADLIGHTS TO AUTOMATICALLY TURN ON WHEN AMBIENT LIGHT DECREASES n ALLOW LIGHTS TO STAY ON AFTER KEY OFF POSITION FOR PREDETERMINED TIME n CAN BE INTERGRATED WITH OTHER LIGHTING SYSTEMS ALSO

3. COMPONENTS n PHOTOCELL n AMPLFIER n POWER RELAY n TIMER CONTROL n HEADLIGHT SWITCH n HEADLIGHT BULBS

4. PHOTOCELL AMPLIFIER n Senses outside light n Internal resistance increases with less light. n When resistance value reaches predetermined value, lights go on. n Triggers autolamp relay n Point of turn on is adjustable CLASS 408

5. PHOTOCELL REPLACEMENT n Usually located on top of dash. n Usually built into amplifier assembly on Ford products n Cleanliness is important to interior work L461 See Photo Sequence # 14

6. POWER RELAY n Provides Power to Headlights in Auto mode. n Can test like any relay

7. TIMER CONTROL

8. HEADLIGHT SWITCH

9. PHOTOCELL TEST n Can make a tool to test Photocell. See Page 463 in Lab n Tool substitutes for photocell