door popper back up

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=118979
Printed Date: May 11, 2025 at 1:22 AM

Topic: door popper back up

Posted By: jnz01
Subject: door popper back up
Date Posted: December 31, 2009 at 1:01 PM

Does anyone know how I would go about hooking up a back up battery to my door solenoids. If the battery on the car ever went dead I wanted a way to get in. I been looking around and i've seen posts of a possible 9v battery backup, does anyone know how I would do this. Currently the solenoids are hooked into the aux outputs on my alarm to standard relays. I've also noticed a lot of talk on the 520t backup although I don't think this is what I'm looking for.

Replies:

Posted By: Ween
Date Posted: January 02, 2010 at 1:36 PM

hi,

i'd forgo the battery backup for the poppers. if it fails, you still won't get in the vehicle. don't believe a 9V battery will supply enough current to activate one anyways. the 520T might but you'd if it goes dead then well..

does you car have a trunk, without the lock shaved. if yes, then route wire(s) from the outputs of the relays to there.

if no, then make a post accessible beneath the vehicle somewhere. use a grommet as an insulator. stainless machine thread screw with a ring terminal attached with a nut to it. pass screw through grommet (washers on each side to compress evenly) . secure in place with locking hardware. route the wire on the ring terminal to the output of your relay. using jumper cables attach negative to frame, tap positive to post you just added..voila door opens

Posted By: jnz01
Date Posted: January 02, 2010 at 2:35 PM

I have a hatch that still has a Key. Was your suggestion to mount the wires in the car and use the key to get in first to reach the wires?

Posted By: Ween
Date Posted: January 02, 2010 at 4:39 PM

yes, that's the idea..maybe have them accessible in a removable panel. still use the jumper cables of course. or climb on in.

Posted By: jnz01
Date Posted: January 03, 2010 at 9:24 AM

Great, Thank you for you help