HEADLAMP — Daytime Light System — Operation + Schematic (Base K11)
EL-43wiring diagramUnverifiedBase K11 HEADLAMP — Daytime Light System operation table + DRL schematic (UEL048). DRL CU senses engine-running (alternator L) and auto-turns-on low beam + clearance/tail + licence/instrument when switch OFF + running (boxed 'added functions' column). Schematic wire colours illegible → ??.
Operation
After starting the engine with the lighting switch in the 'OFF' position, the headlamp low beam and clearance, tail, license and instrument illumination lamps automatically turn on. Lighting switch operations other than the above are the same as conventional light systems.
Headlamp High beam
Stopped OFF (A/B/C)X/X/O
Stopped 1ST (A/B/C)X/X/O
Stopped 2ND (A/B/C)O/X/O
Running OFF (A/B/C)X/X/O
Running 1ST (A/B/C)X/X/O
Running 2ND (A/B/C)O/X/O
Headlamp Low beam
Stopped OFF (A/B/C)X/X/X
Stopped 1ST (A/B/C)X/X/X
Stopped 2ND (A/B/C)X/O/X
Running OFF (A/B/C)O/O/O
Running 1ST (A/B/C)X/X/X
Running 2ND (A/B/C)X/O/X
Clearance and tail lamp
Stopped OFF (A/B/C)X/X/X
Stopped 1ST (A/B/C)O/O/O
Stopped 2ND (A/B/C)O/O/O
Running OFF (A/B/C)O/O/O
Running 1ST (A/B/C)O/O/O
Running 2ND (A/B/C)O/O/O
License and instrument illumination lamp
Stopped OFF (A/B/C)X/X/X
Stopped 1ST (A/B/C)O/O/O
Stopped 2ND (A/B/C)O/O/O
Running OFF (A/B/C)O/O/O
Running 1ST (A/B/C)O/O/O
Running 2ND (A/B/C)O/O/O
NOTE
Legend: O = Lamp ON, X = Lamp OFF. Boxed cells (Running + OFF column) = added DRL functions. The DRL adds: with engine running and switch OFF, low beam + clearance/tail + license/instrument lamps come ON automatically (the boxed column). All other switch operations match conventional lighting.
Schematic
DRL system schematic (UEL048)
Components (13)
BatteryAlternator (L terminal / charge warning lamp — engine-running sense)Fusible Link Box (15A×2 fuses + 65A fusible link)Ignition Switch ON or START + 10A fuseIgnition Switch START + 10A fuseDaytime Running Light Control UnitLighting Switch (OFF/1st/2nd × A/B/C)Headlamp L.H. (low/high)Headlamp R.H. (low/high)High Beam IndicatorClearance LampsLicence Plate LampsTail Lamps
Connections (8)
Battery
BatteryFusible Link Box (15A×2 fuses + 65A fusible link)schematic — colours not individually legible
Alternator (L terminal / charge warning lamp — engine-running sense)
Alternator (L terminal / charge warning lamp — engine-running sense)Daytime Running Light Control Unitcharge/L sense (engine-running detection)
Fusible Link Box (15A×2 fuses + 65A fusible link)
Fusible Link Box (15A×2 fuses + 65A fusible link)Daytime Running Light Control Unit15A fused power
Daytime Running Light Control Unit
Daytime Running Light Control UnitHeadlamp L.H. (low/high)low/high beam control
Daytime Running Light Control UnitHeadlamp R.H. (low/high)low/high beam control
Daytime Running Light Control UnitClearance Lampsauto-on output
Daytime Running Light Control UnitTail Lampsauto-on output
Lighting Switch (OFF/1st/2nd × A/B/C)
Lighting Switch (OFF/1st/2nd × A/B/C)Daytime Running Light Control Unitswitch position input
NOTE
The Daytime Running Light Control Unit senses engine-running via the alternator charge/L line and, when the lighting switch is OFF, automatically energizes low beam + clearance/tail + licence/instrument lamps. Schematic wire colours are not individually legible at this raster resolution (marked ?? per never-guess rule). Lighting-switch continuity grid (terminals 5-12) at top right matches EL-40.