How would I go about wiring up a backup battery? <a href="http://www.partsexpress.com/pe/pshowdetl.cfm?&PartNumber=140-460&DID=7">Example of what I want to use</a>
Do I just wire it up to the positive and negative lines with diodes and if that's all I do, what kind of diodes do I need?

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, Jon (350 TBI!)
91 Red RS w/grey int, sq stereo (Alpine v12, kicker solo, MB quart premium etc)

• Holley 670 TB unit w/ 1/2" spacer/adapter
• Edelbrock RPM vortec intake
• 350ho 330hp vortec crate motor
• 8" harm. balancer
• Stewart stage 2 water pump w/160 thermo
• SLP tri-y headers to full 3"
• Rebuilt trans w/ SLP shift kit
• Centerline 16x8's all around
• 36/24 mm sway bars
• Full poly bushings, even motor mounts
• SLP LCA and panhard
• Alston SFCs
• Edelbrock 3 point STB
• Global west steering brace aka wonderbar
• Eibach pro kit springs
• Bilstien high perf. struts and shocks
• All this and I still have AC

My websiteAny questions?

 

Connect the back up battery + terminal to the security system power fuse, and ground the - terminal of the back up battery. Feed +12 volt battery power from the car to the security system & back up battery through a fuse and a diode. The current rating of the fuse and diode should be on the order of 10 amps, or so, to accomodate the in rush charging current to the back up battery.

Tim