AutoLamp sunlight sensor & timer module, used at least from the 70s into the early 90s in many Ford/L/M luxury cars. The 5 terminals are for:
switched power (ignition) R/Y
switched ground (system on/off) Pu/Or
relay output (headlights on) Wh/Pu
battery power (delay function) Or/Wh
delay input (time adjustment) DB/Or

Owner caption December 2004 · Photo 849 of 5000