420SEL (126.035) V8-4.2L (116.965) (1986)
9. Disconnect plug-connector from buffer battery/reserve power source terminals.
Installation:
10. Connect plug-connector to buffer battery/reserve power source terminals.
11. Install buffer battery/reserve power source securely.
12. Check system with tester, See: Testing and Inspection/Component Tests and General Diagnostics.
13. Continue installation in reverse order of removal.
14. Check system with RS/SRS control lamp (A1e15).