disconnect battery before an install?
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=69415
Printed Date: May 17, 2024 at 11:13 AM
Topic: disconnect battery before an install?
Posted By: shawzie
Subject: disconnect battery before an install?
Date Posted: December 28, 2005 at 9:27 PM
I searched to see if you should disconnect the battery before an install and it is about 50/50?.So should you or not?Won't you fry stuff by connecting wires that are live.Is it better to do it and how do you find out if your vehicle will need to be reset if you do disconnect it(without actually doing it)
Replies:
Posted By: Mr_Kite
Date Posted: December 28, 2005 at 9:51 PM
You should disconnect the battery. If you do the install correctally you shouldnt fry anything, but why take the chance?
Posted By: cntrylvr79
Date Posted: December 28, 2005 at 9:53 PM
I have yet to disconnect a battery putting an alarm in. How are you supposed to test things with no power in the car?
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Cause I'm So white and nerdy...
First Class Certi-fried installer
Posted By: shawzie
Date Posted: December 28, 2005 at 9:55 PM
Can't you test and label your wires then do your connections
Posted By: tampa77
Date Posted: December 28, 2005 at 9:59 PM
Most issues are w/ incorrect wiring of systems and a disconnected battery provides no protection, once reconnected you are all done. A DMM, common sense and a few inline fuses are all you need. A disconnected battery resulsts in reseting clock, Radio (some may need codes to get back,) etc.. Never mind a pissed off customer if they did not know and have to reprogram anything. Like cntrylvr79 stated, how can you properly test the wires? Just my opinion.
Posted By: shawzie
Date Posted: December 28, 2005 at 10:10 PM
Well I read on here that my jeep ignition harness unplugs so it is easy to do connections and I was just wondering if plugging it back in live would hurt anything,My buddy installed a performance chip into his car but never unplugged the battery and it started smoking.
Posted By: cntrylvr79
Date Posted: December 28, 2005 at 10:13 PM
what make a model jeep. I done a couple disconnectiung the ignition harness without problems
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Cause I'm So white and nerdy...
First Class Certi-fried installer
Posted By: shawzie
Date Posted: December 28, 2005 at 10:15 PM
2002 liberty sport,any tips or reccomendations woul be great as it's my first install.
Posted By: Teamrf
Date Posted: December 28, 2005 at 10:26 PM
I've never disconnected a battery before. I def. wouldn't do it on a newer car..may light the dash up like a christmas tree.  ------------- ~The Rookie~
Rookie of the year that is...
Don't let the smoke out of your equiptment..it doesn't go back in.
Posted By: tragik
Date Posted: December 29, 2005 at 2:02 AM
There is no reason to unplug the the ignition switch in a jeep liberty. All the main ignition wires are easily accessed without unpluging anything.
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Northstart.....or start it your damn self.
Posted By: Powermyster
Date Posted: December 29, 2005 at 7:25 AM
have to say i never unplugged a beattery and i test all my wires first..
shouldn't be a problem if done correctly
like the man siad....
Most issues are w/ incorrect wiring of systems and a disconnected battery provides no protection, once reconnected you are all done.
i usually wire the alarm in without the fuse in then put the fuse for the alarm in last
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Why oh Why didn't i take the blue pill
Darren Power
Posted By: p-mann
Date Posted: December 29, 2005 at 8:12 AM
Regarding the smoking of a DME/ECU when chipping... that ONLY happens when the chip is installed backwards. When you install a chip the wrong way around, you wind up putting the +12v and +5v onto a ground and a signal input pin. That leads to a smoked chip instantly. To install a performance chip you just disconnect the computer, open it, install, and reconnect. Disconnecting the battery does nothing that unplugging the computer and putting on the bench won't do... Markus
Posted By: Powermyster
Date Posted: December 29, 2005 at 6:25 PM
depends on ecu but what p-man said is right.
if you have to keep the ecu in the car for any reason then disconnect the battery before the install of the chip
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Why oh Why didn't i take the blue pill
Darren Power
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