Standby Power Supply: Service and Repair

Removing and Installing Reserve Power Source for Airbag and Belt Tensioner (up to 09/87):

NOTE: In vehicles with airbag 1/3 (recognizable from the inscription 1/3 on the test coupling/plug connection, airbag, 10-pin, X29/9), the reserve power source is removed and the plug connection is isolated.

Special Tools (Vehicles Up To 9/87):

NOTE: The 2nd version differs in the modified location of the red 10-pin plug connection from the bracket of the foot-operated parking brake to the plate located under the foot rest.

Removing:





1. Turn ignition key to position "0", disconnect negative terminal of battery and cover.
2. Remove front cover left under dashboard on first version only.
3. Disconnect red 10-pin plug connection on bracket of foot-operated parking brake or on plate in passenger footwell.





4. Remove hardtop or fold back roadster top (on vehicles with heated rear window loosen plug connection).
5. Remove left-hand side panel in rear compartment.
6. Unscrew bolts and deposit voltage transformer.





7. Unscrew mounting bolts, pull off plug connection and remove reserve power source.

Installing:
8. Install reserve power source and plug on plug connection.
9. Check system using tester. [1][2]Component Tests and General Diagnostics
10. Continue installation in the reverse sequence.
11. Check system with SRS/RS warning lamp.