Electrical circuit diagram of heating, ventilation, windshield wipers (Sierra)

1 – ventilation control switch; 2 – fan motor; 3 – rear window wiper and washer switch; 4 – rear and windshield washer motor; 5 – rear window wiper motor; 6 – intermittent wiper programmer; 7 – Windscreen wiper motor; 8 – intermittent windshield wiper relay; 9 – External lighting and windshield wiper switch; 10 – low and high beam headlight switch; 11 – Sound signal button; 12 – direction indicator switch; 13 – Hazard warning lights switch; 14 – Multifunctional switch; 15 – Headlight wiper motors; 16 – Headlight wiper relay