LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

Best place to tie into Battery & Ignition power under dash

Thread Tools
 
Search this Thread
 
Old 10-11-2008, 12:54 PM
  #1  
Supreme Member

Thread Starter
iTrader: (3)
 
3.1EyeCandy's Avatar
 
Join Date: Jan 2001
Location: Conroe, TX
Posts: 3,165
Received 54 Likes on 40 Posts
Car: 1987 GTA
Engine: LS1
Transmission: 4L60e
Best place to tie into Battery & Ignition power under dash

Got my Speartech LS1 harness mostly put in and have the battery & ignition sources for the ECM to hook up inside the cabin (the ecm is where the original ecm was). What have others been hooking into? I thought about using the fuse panel areas for extra tie ins - but they are only rated for 35W each... Any suggestions?
Old 10-11-2008, 01:52 PM
  #2  
Senior Member

iTrader: (2)
 
Aaron91RS's Avatar
 
Join Date: Jul 1999
Location: St. Louis
Posts: 875
Likes: 0
Received 2 Likes on 1 Post
Car: RS
Engine: LS1
Transmission: T56
Axle/Gears: 9" for the ladies
Re: Best place to tie into Battery & Ignition power under dash

Shouldn't the battery go straight to the battery, not inside where there is only ignition power.
I hooked a few up to the power wires coming out of the plug that used to power the old ecm on the passenger side.
That wasn't a speartech harness though.
Old 10-11-2008, 10:10 PM
  #3  
Supreme Member

Thread Starter
iTrader: (3)
 
3.1EyeCandy's Avatar
 
Join Date: Jan 2001
Location: Conroe, TX
Posts: 3,165
Received 54 Likes on 40 Posts
Car: 1987 GTA
Engine: LS1
Transmission: 4L60e
Re: Best place to tie into Battery & Ignition power under dash

Yeah I didn't take note of what fuse requirements the new Speartech had - but I want to say it was 3 30 w fuses (2 bat, 1 ign) that then hook to the ecm (anybody want to clarify that? I'm away from the car for another week). Which puts a 60w load on one wire to hook for battery. I'm okay with running a line from the engine compartment into the cabin just for the ecm...but thought it would be cleaner if there was a place ready to hook up to nearby.
Old 10-12-2008, 12:30 AM
  #4  
Member

iTrader: (1)
 
BCdawg57's Avatar
 
Join Date: Feb 2005
Location: Columbus, OH, USA
Posts: 424
Likes: 0
Received 0 Likes on 0 Posts
Car: '91 Z28, '13 Civic EX-L
Engine: 355 LT1, 1.8 I4
Transmission: T56, 5spd auto
Axle/Gears: 10 bolt 3.42(as long as no breaky)
Re: Best place to tie into Battery & Ignition power under dash

for my lt1 i just took the pink ignition wire and the red power dist wire and cut them off the back of the c100 connector and spliced there. for the battery i spliced into the red wire, just strip a 1 inch or so section off the pwr wire and run the orange ( the battery wire was orange on my speartech harness) wire through, wrap it a few times and solder. the pink ign wire i just cut and spliced with speartechs and everything worked fine. He put a fuseblock on my harness so i didnt have worry about fuses. I dont know if he did that to yours or not.

the colors are for my 91 they may vary for your setup.
Old 10-12-2008, 03:13 PM
  #5  
Senior Member

iTrader: (2)
 
Aaron91RS's Avatar
 
Join Date: Jul 1999
Location: St. Louis
Posts: 875
Likes: 0
Received 2 Likes on 1 Post
Car: RS
Engine: LS1
Transmission: T56
Axle/Gears: 9" for the ladies
Re: Best place to tie into Battery & Ignition power under dash

for what I was talking about I only used those old ecm wires to trip a relay and the relay got it's power from the battery. That way the load was on the relay not the old ecm wires.
Old 10-12-2008, 07:16 PM
  #6  
Supreme Member

iTrader: (4)
 
ghettocruiser's Avatar
 
Join Date: Sep 2002
Location: PA
Posts: 3,685
Received 10 Likes on 9 Posts
Car: 86 Trans AM
Engine: LS1 (not stock...)
Transmission: Built T56
Axle/Gears: Strange 12-bolt w/ 3.73
Re: Best place to tie into Battery & Ignition power under dash

Originally Posted by Aaron91RS
for what I was talking about I only used those old ecm wires to trip a relay and the relay got it's power from the battery. That way the load was on the relay not the old ecm wires.
Bingo.. Thats what Ide do. Ide set up a relay system. Use alittle heavier gauge wire, and have an "ignition hot" wire from the fuse block to trigger the relay for your "ign power". For battery hot, Ide be tempted to run a nice new wire out to the battery...along with the one that is going through your ign hot relay.

J.
Old 10-14-2008, 07:45 PM
  #7  
Supreme Member

Thread Starter
iTrader: (3)
 
3.1EyeCandy's Avatar
 
Join Date: Jan 2001
Location: Conroe, TX
Posts: 3,165
Received 54 Likes on 40 Posts
Car: 1987 GTA
Engine: LS1
Transmission: 4L60e
Re: Best place to tie into Battery & Ignition power under dash

That sounds like the best idea Justin. Gotta get another relay then...
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
BRoss99
Electronics
27
12-07-2020 06:50 PM
Rakim_RS25TH
Car Audio
1
08-20-2015 06:22 PM
stalkier
Electronics
0
08-13-2015 12:59 PM



Quick Reply: Best place to tie into Battery & Ignition power under dash



All times are GMT -5. The time now is 01:39 PM.