Nov 29, 2020 · Symptoms of a Bad Airbag Clock Spring. An airbag clock spring is used to connect the steering wheel to other electrical devices such as the airbag safety system, radio volume and station selections, horn and cruise controls. BMW - electrical systems - WIRING DIAGRAM Models covered: • 3-Series (E30) 316 (83 to 88), 316i (88 to 91), 318i (83 to 91), 320i (87 to 91), 325i (87 to 91).Also Touring and Acer predator helios 300 windows 10 drivers