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AUTOMATIC HEADLIGHTS (ON/OFF WITH DELAY)

AUTOMATIC HEADLIGHTS (ON/OFF WITH DELAY). CHAPTER 13 CLASSROOM 408 TO 411 LAB 458 TO 465. SYSTEM OPERATION. ALLOWS HEADLIGHTS TO AUTOMATICALLY TURN ON WHEN AMBIENT LIGHT DECREASES ALLOW LIGHTS TO STAY ON AFTER KEY OFF POSITION FOR PREDETERMINED TIME

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AUTOMATIC HEADLIGHTS (ON/OFF WITH DELAY)

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

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

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

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

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

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

  7. TIMER CONTROL

  8. HEADLIGHT SWITCH

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

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