+12V Sources???
Thread Starter
Evolving Member
Joined: Jun 2005
Posts: 164
Likes: 0
From: Kitchener, Ontario
+12V Sources???
I'm in the middle of finally installing my MS2. Everything is wired in except for my +12V power source. I need to find a +12V source that is constant through cranking. All the power sources I've located drop to 0 while cranking.
Anyone have a viable source for the power supply needed?
Anyone have a viable source for the power supply needed?
Evolving Member
Joined: Apr 2006
Posts: 149
Likes: 0
From: Waskom, TX
Originally Posted by phil_
yea the battery is an option. I was hoping to find a source inside the cabin.
My battery is in the trunk, I would need approx 9-10ft of wire to hook it up there.
My battery is in the trunk, I would need approx 9-10ft of wire to hook it up there.
Im not an electrician by any means, but any constant should stay constant. there should be no reason for it to drop to 0 when cranking. i mean, it WILL drop some no matter what because the car uses a lot of amps to crank and that takes away from the total current of the system momentarily. in theory you should still have a detectable drop in voltage/amperage even when hooked directly to the battery. but again, i dont see why it should go to 0. .
Do not tap a fuse as this is the getta way of getting power. It looks cheap and the wires can easy pull out...
You can get a 12v source behind the radio but that wire is only about 22 gauge, and you will be running more than was intended on that line.
I would tap into the 12v wire under the steering column as this is heavy gauge and will hav plenty of current to supply whetever you need.
I dont remember what the wire color is for this, I think its white/black..but dont hold me to it.
You can get a 12v source behind the radio but that wire is only about 22 gauge, and you will be running more than was intended on that line.
I would tap into the 12v wire under the steering column as this is heavy gauge and will hav plenty of current to supply whetever you need.
I dont remember what the wire color is for this, I think its white/black..but dont hold me to it.
Trending Topics
Thread Starter
Evolving Member
Joined: Jun 2005
Posts: 164
Likes: 0
From: Kitchener, Ontario
Originally Posted by Foxphyre
why is your battery in your trunk?
Im not an electrician by any means, but any constant should stay constant. there should be no reason for it to drop to 0 when cranking. i mean, it WILL drop some no matter what because the car uses a lot of amps to crank and that takes away from the total current of the system momentarily. in theory you should still have a detectable drop in voltage/amperage even when hooked directly to the battery. but again, i dont see why it should go to 0. .
Im not an electrician by any means, but any constant should stay constant. there should be no reason for it to drop to 0 when cranking. i mean, it WILL drop some no matter what because the car uses a lot of amps to crank and that takes away from the total current of the system momentarily. in theory you should still have a detectable drop in voltage/amperage even when hooked directly to the battery. but again, i dont see why it should go to 0. .
I need a constanst power supply to power my megasquirt ECU WHILE cranking since it controls fuel injection/igniton upon startup.
Thread Starter
Evolving Member
Joined: Jun 2005
Posts: 164
Likes: 0
From: Kitchener, Ontario
Originally Posted by kmcconn9
Do not tap a fuse as this is the getta way of getting power. It looks cheap and the wires can easy pull out...
You can get a 12v source behind the radio but that wire is only about 22 gauge, and you will be running more than was intended on that line.
I would tap into the 12v wire under the steering column as this is heavy gauge and will hav plenty of current to supply whetever you need.
I dont remember what the wire color is for this, I think its white/black..but dont hold me to it.
You can get a 12v source behind the radio but that wire is only about 22 gauge, and you will be running more than was intended on that line.
I would tap into the 12v wire under the steering column as this is heavy gauge and will hav plenty of current to supply whetever you need.
I dont remember what the wire color is for this, I think its white/black..but dont hold me to it.
Evolving Member
Joined: Apr 2006
Posts: 149
Likes: 0
From: Waskom, TX
Originally Posted by phil_
my Zeitronix/EBC is hooked up to the 12V in the steering/ignition column. Would it be safe to run the MS2 off this source aswell? WOuld I need a new fuse?
Thread Starter
Evolving Member
Joined: Jun 2005
Posts: 164
Likes: 0
From: Kitchener, Ontario
Originally Posted by Foxphyre
how much power is this thing supposed to pull? i mean the ignition wires are pretty serious stuff compared to the wires behind the radio.
-CONSTANT +12V - battery
-2x ACCESSORY +12V
-Starter Wire +12V – ignition column
Also Zeitronix:
-12V ACCESSORY
EBC:
-2x +12V ACCESSORY
Knocklite:
-+12V ACCESSORY
ASwell as the MS CONSTANT +12V 20A
Thread
Thread Starter
Forum
Replies
Last Post
dankaristo
Evo X Engine Management / Tuning Forums
4
Nov 9, 2008 09:58 PM
Inprogress
Evo Electrical / Audio / Security
5
Jul 29, 2008 04:14 PM
