Jump starting a V12 HE

[Aristides (Aristides Balanos)]

Its for the saloon, but imagine also applies for the XJS.

Buzzer Circuit Modification

Hi all, This is a simple modification to render the buzzer into something more useful instead of it coming on whenever the key is inserted in the ignition. The primary circuit of a SPST relay (85) is powered from the unused 87A (NC) contact of the red Main relay by the main fuse panel. It’s then grounded (86) via the Door Switch. The secondary circuit (30) is powered from the Lights Switch (I used the Instrument lights contact) and connects to the buzzer (87) and then to ground. With this mo…