Battery backup on remote start ?

I was wondering how in general the battery back up works with the remote start in the event the battery has been cut. What I'm curious about is what happens if the battery is and the user then goes to remote start?

Is the backup wired in series to the alarm or just taps into the positive connection to the alarm to keep high current from flowing through it?

What does this mean,"What I'm curious about is what happens?"?if the battery is and the user then goes to remote start?"? If you mean what happens when the main battery is disconnected, then the alarm will still work but the remote start will not. The alarm's power wire is isolated from the rest of the power in the vehicle when you add a BUB. The wiring goes this way, main power to isolation/charging circuit, then out put to alarm's main power input, there is a ground and usually a trigger for voltage sensing from the isolation/charging circuit.

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Certified Security Specialist
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Sorry, I realize that at times I end up typing in what others call "yoda speech". Not very clear and in the wrong order.

My question is related to the fact that in the case of the Autopage 750LCD for example there are 2 constant power wires (red). Both with 30 amp fuses. I assume (this might be where the trouble begins) that you do not need 30 amps of power to run the alarm brain functions (siren, timing, latches, etc..). I figured the 2 30amp wires supply power through the internal relays to the ign and acc out. So I figured you would have to install the BUB to one of these wires reed wires. Now with the main battery disconnected the user tries to RS and the brain flips the internal relays and energize the ign circuit(s). In my "theory" this would cause the ign circuits to pull power form the BUB. Now am I wrong and one wire is actually low current and just powers the brain or does the isolating/charging circit in the BUB just shut off?

I am unfamiliar with that alarm. You would only want to hook the BUB to the wire that controls the alarm functions and not to the wire that powers the relays. The BUB would drain almost instantly if it was hooked to the main relays and you tried to remote start the vehicle with the main battery disconnected.

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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.