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Message: <blockquote data-quote="keep_hope_alive" data-source="post: 8667792" data-attributes="member: 576029">Your relay plan is fine assuming you are using the N.C. contact for interior speakers and the N.O. contact for external/trunk speakers.Note that many hood/trunk pins switch to ground (the way they are mounted to metal) so it would be on the ground pin for the relay, tying the relay coil to ground. if you put the hood/trunk pin on the 12V lead in, it'd just short out the source/fuse. you'd need a pin with two internal, insulated contacts to wire them the way you show, but i'd still just switch the relay coil ground and not the hot (typical industry practice). you could also have an override switch so he can defeat this feature (if desired) with a toggle switch in-line with the relay coil ground.</blockquote>

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