+12 volt supply wires
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=29398
Printed Date: May 13, 2025 at 10:49 PM
Topic: +12 volt supply wires
Posted By: sterrell
Subject: +12 volt supply wires
Date Posted: March 31, 2004 at 12:16 PM
My alarm has need for four positive +12 volt supply wires (1 for the brain, 2 for the onboard relays in the brain, and 1 for dome light supervision relay). I know all of these should be fused between the car's 12 volt power wire and the components of the alarm. My question is, should these wires all be soldered to a single node on the car's power wire with the fuses after the node? As of now I have wire taps tapping into the power wire at four different locations. I realize this is probably not the best thing to do. The reason I ask is that I am going through to solder all connections and remove all my wire taps. I believe that the numerous problems with my install are because of loose connections. Especially since certain features are only functional when the brain is placed in a certain position under the dash.
Replies:
Posted By: profuse007
Date Posted: March 31, 2004 at 1:04 PM
check out the vehicle diagram on this site up to 2000 models to see the power source, usually in the ignition harness.
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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).
Posted By: sterrell
Date Posted: March 31, 2004 at 1:26 PM
I know where I can tap into the twelve volts, i was just wondering if it was common practice to have one soldered node with four wires branching from a stripped section of the power wire under the dash. I am also wondering if a fuse is necessary for each wire.
Posted By: derek123
Date Posted: March 31, 2004 at 2:21 PM
No problem, as long as your wire of choice can handle the ( total
) extra load. Fuses are good. It certainly wont hurt having a fuse on each line. Now, not having a fuse on every line, that could hurt. 1.50 $ fuse holder vs. 20, 000 $ vehicle...........
Posted By: sterrell
Date Posted: March 31, 2004 at 3:31 PM
How can I be sure that my 12 volt wire under the dash can handle the total load of the four wires tapped into it. I thought that this wire was the only option for getting twelve volts of power. Would I possibly have to branch another wire off the battery terminal? Is that what you are implying?
Posted By: JWorm
Date Posted: March 31, 2004 at 6:58 PM
Year, make and model?
I'd recommend multiple connections instead of one big clump of solder.
Posted By: sterrell
Date Posted: March 31, 2004 at 7:12 PM
Its a Pontiac Firebird 1992. I currently am using a bunch of tap in connectors on the line. Should I just solder to each one of these points?
Posted By: Velocity Motors
Date Posted: March 31, 2004 at 11:43 PM
If your unsure, it's better to be safe and run a new wire straight to the battery.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
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