Hi Joe, The disconnect switch on the (+) or (-) cable does the same thing, it isolates the battery from the car. I am a bit confused by you wanting to disconnect the battery but yet still keep the car running. What is the reason you want to do something like this? With all the electronics in cars, even ours, this is not something you want to do! Larry - Cleveland -----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of Joseph F. Byrd, Jr. Sent: Friday, July 15, 2016 4:50 PM To: 'Pantera Mail List' Subject: Re: [DeTomaso] Relay Activated Battery Cut-off switch I would also be interested in comments about the second part of Rob's question. For my disconnect switches, I have installed them on the battery ground with the intent to isolated the battery from draining. However this would allow the alternator to keep the engine running when disconnected. I have worried that the alternator's voltage regulator could swing without the battery capacitance. I would THINK if the intent were a energy isolation to kill the car/engine, the switch should be on the positive feed (with the alternator still connected to the battery). Joe -----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of Rob Dumoulin Sent: Friday, July 15, 2016 8:55 AM To: Pantera Mail List Subject: [DeTomaso] Relay Activated Battery Cut-off switch ...Could it damage anything if the battery were accidentally isolated while the car is running (i.e. MSD ignition or fuel injection computer)? _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list DeTomaso@server.detomasolist.com http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages.