Disabling System

Obtain radio code number from customer, and deactivate audio anti-theft function. Turn ignition switch off. Disconnect and shield negative battery cable.
On Miata, disconnect Orange and Blue clockspring connectors located at base of steering column. See Fig 1. On 929, Disconnect diagnostic module connector, and connect Short Circuit Connector (49-H066-004) to harness connector. See Fig 2.

Fig 1: Disabling Air Bag System (Miata)

Fig 2: Disabling Air Bag System (929)