Backup Battery Relay Sanity Check
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Posted: January 05, 2005 at 11:03 AM / IP Logged
OK, I'm getting ready to install a backup battery in my 1991 318is for the Alpine SEC-8048 alarm system I put in. Will the set up below work to 
Thoughts? Did I get this right? How large a diode should I use to protect the circuit that leads to the alarm's backup battery connection? I've got the parking lights isolated with a relay, so the backup battery should only be running the main unit and the siren.
Thanks!
John
- Isolate the backup battery to prevent draining it if I leave my lights on, and
- trigger the alarm when main power is cut.
Thoughts? Did I get this right? How large a diode should I use to protect the circuit that leads to the alarm's backup battery connection? I've got the parking lights isolated with a relay, so the backup battery should only be running the main unit and the siren.
Thanks!
John
Posted: January 11, 2005 at 5:11 PM / IP Logged
Posted: January 11, 2005 at 5:17 PM / IP Logged
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