Clockspring Assembly / Spiral Cable: Description and Operation

The inflatable restraint steering wheel coil consists of two or more current-carrying coils. They are attached to the steering column and two of the current-carrying coils allow rotation of the steering wheel while maintaining continuous contact of the driver deployment loop to the inflatable restraint steering wheel module.

There is a shorting bar on the yellow 2-way connector near the base of the steering column which connects the SIR coil to the SIR WIRING harness. The shorting bar shorts the circuits to the SIR coil and inflatable restraint steering wheel module when the yellow 2-way connector is disconnected. The circuit to the inflatable restraint steering wheel module is shorted in this way to help prevent unwanted deployment of the air bag when servicing the steering column or other SIR system components.