Stereo power wire through the firewall

D

djltoronto

Member

:

Mazda 3 Sport

• Oct 25, 2004

• #1

Anyone running a power wire through the firewall might find this useful.

In the engine compartment, just below the brake booster there is a white plug. This white plug plugs a hole that appears as though it may be used for a throttle cable. Since my car (2.3 liter) has drive by wire electronic throttle body, this pre-made hole in the firewall is perfect for a power cable.

The hole will accommodate a 4 gauge power cable with no difficulty, but anything larger than that will not fit without modification.

The pics show exactly where the hole is.
And yes... I am aware that I used black wire for my + power wire.

 

Attachments

• 
  power wire 01.jpg

  100.3 KB · Views: 6,057
• 
  power wire 02.jpg

  141 KB · Views: 3,857
• 
  power wire 03.jpg

  119.9 KB · Views: 5,537

B

bluntman

Member

:

2004 Mazda3 Sport GT

• Oct 25, 2004

• #2

Great news! Approximately where does the wire end up in the passenger compartment?

 

D

djltoronto

Member

:

Mazda 3 Sport

• Oct 25, 2004

• #3

bluntman said:

Great news! Approximately where does the wire end up in the passenger compartment?

Click to expand...

Kinday funny...
I grab my digital camera and run outside to take a pic of this, got outside to find my car is locked and keys are inside the house. So I run back in to get the keys, then back out to take the pic, turn the camera on and I find that I have left the memory card in my computer... So back inside, for the card.. and finally...results..(see pics)
It comes into the passenger compartment directly above the pickup for the throtle.

I then followed the factory wiring harness up and out of the way!!

 

Attachments

• 
  power wire.jpg

  140.2 KB · Views: 2,295
• 
  power wire 003.jpg

  373.9 KB · Views: 2,566

I

iaminea

Member

:

2004 Mazda 3i

• Nov 21, 2004

• #4

Nice post djltoronto
This information was very usefull in installing my amp last night.

 

D

djltoronto

Member

:

Mazda 3 Sport

• Nov 21, 2004

• #5

iaminea said:

Nice post djltoronto
This information was very usefull in installing my amp last night.

Click to expand...

Glad I could help!!

 

T

Tricked-Out-Toy

Member

• Feb 8, 2005

• #6

great info i was wondering about that, thanks

 

B

briand805

Member

Contributor

• Feb 8, 2005

• #7

Also there is a plug in the upper left hand corner of the engine bay.. Huge.. I ran 1/0 gauge through no problem plus another smaller. Just pull it back and have a look see.

http://mazda3forums.com/gallery/albums/userpics/14306/DSCF0032.JPG

 

Last edited: Feb 8, 2005

N

nwa_95

Member

:

mazda 3

• Dec 18, 2010

• #8

im getting ready to do an amp install and came across this, I know its a really old thread so hopefully someone will check my post and reply. I have 2 questions:

1) this may sound stupid, but how do you get the white plug out
2) is it safe to have an opening through the firewall like that.

Thanks for the help.
-God Bless-
Tim
www.loudthemc.com

 

L

LukeMatwichuk

Member

:

mazda 3

• Jun 26, 2014

• #9

how do you g the white plug out?