Conversions & Swaps LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

wiring questions on truck harness

Thread Tools
 
Search this Thread
 
Old 07-09-2007, 09:40 AM
  #1  
Launching!
Thread Starter
iTrader: (9)
 
1987earthquake's Avatar
 
Join Date: May 2007
Location: Hattiesburg, MS
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts

Default wiring questions on truck harness

I set my motor in this weekend and started wiring it up. These are a few wires I questioned about:


Blue connector by fusebox
-yellow/black pin E VSS Do I need this

Black connector by fusebox
-Brn/wht pin G check engine lamp does this just run to gnd on the engine light
-Grn/Wht pin D vss out do i need this
-PPL pin E brake pedal tcc does this just run to the brake pedal switch
-Tan/wht pin J oil pressure do i need this if I'm using my stock sending unit

where does ign switch connect on fuse box
starter wire from inside car? where to connect
Old 07-09-2007, 02:07 PM
  #2  
Launching!
Thread Starter
iTrader: (9)
 
1987earthquake's Avatar
 
Join Date: May 2007
Location: Hattiesburg, MS
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts

Default

come on guys I need this info asap. tryin to get her fired up by the weekend.
Old 07-09-2007, 03:01 PM
  #3  
TECH Addict
iTrader: (5)
 
xXxSilveradoxXx's Avatar
 
Join Date: Apr 2003
Location: Willows, California
Posts: 2,010
Likes: 0
Received 1 Like on 1 Post

Default

Make, Model and Year of the vehical that the motor is going into and also for the vehical the motor came out of.
Old 07-09-2007, 03:46 PM
  #4  
On The Tree
iTrader: (22)
 
hosspowerinc's Avatar
 
Join Date: Apr 2007
Location: Marshville NC
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
Default

VSS- Vehicle Speed Sensor- You need this for an electronic speedo
Brake pedal tcc- You need this for cruise control
Oil pressure- You dont need it if your running another sender

None of this stuff will affect the motor starting up or not
Old 07-09-2007, 06:02 PM
  #5  
TECH Regular
iTrader: (1)
 
68shortstep's Avatar
 
Join Date: Oct 2005
Location: tulsa OK
Posts: 439
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by hosspowerinc
VSS- Vehicle Speed Sensor- You need this for an electronic speedo
Brake pedal tcc- You need this for cruise control
Oil pressure- You dont need it if your running another sender

None of this stuff will affect the motor starting up or not
you're wrong on the TCC switch... that also is used to lock-up your converter.. and you do need this hooked up to your brake switch... this wire gets hooked to a all time power untill you hit the brakes (then the wire becomes open)
Old 07-09-2007, 06:03 PM
  #6  
On The Tree
iTrader: (22)
 
hosspowerinc's Avatar
 
Join Date: Apr 2007
Location: Marshville NC
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
Default

My bad. I redid a m6 harness so Im not familiar with the a4 stuff.
Old 07-09-2007, 06:23 PM
  #7  
Launching!
Thread Starter
iTrader: (9)
 
1987earthquake's Avatar
 
Join Date: May 2007
Location: Hattiesburg, MS
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by hosspowerinc
VSS- Vehicle Speed Sensor- You need this for an electronic speedo
Brake pedal tcc- You need this for cruise control
Oil pressure- You dont need it if your running another sender

None of this stuff will affect the motor starting up or not
I also need to know where my ignition wire hooks to on the fuse box as well as the starter wire.

Thanks for all the help you guys are providing me.
Old 07-09-2007, 06:26 PM
  #8  
On The Tree
iTrader: (22)
 
hosspowerinc's Avatar
 
Join Date: Apr 2007
Location: Marshville NC
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
Default

You need to build a relay box for those. Lots of wiring info in the f.a.q. sticky. The starter wire will be the original wire used in the conversion car. You can get rid of the purple one.
Old 07-09-2007, 08:30 PM
  #9  
sawzall wielding director
iTrader: (4)
 
G-Body's Avatar
 
Join Date: Sep 2004
Location: Downers Grove, IL
Posts: 3,120
Received 8 Likes on 8 Posts

Default

Originally Posted by 1987earthquake
I set my motor in this weekend and started wiring it up. These are a few wires I questioned about:


Blue connector by fusebox
-yellow/black pin E VSS Do I need this you can use this for your speedometer as long as it will accept a 4000ppm square wave DC signal

Black connector by fusebox
-Brn/wht pin G check engine lamp does this just run to gnd on the engine light this wire provides a ground signal to turn on the MIL light, connect it to one side of the light and connect the other side of the light to a wire that is IGN+
-Grn/Wht pin D vss out do i need thisShould be the same output as blue connector pin E
-PPL pin E brake pedal tcc does this just run to the brake pedal switch yep, this wire should get IGN+ 12V until you depress the brake pedal
-Tan/wht pin J oil pressure do i need this if I'm using my stock sending unit no, this is not needed

where does ign switch connect on fuse box
starter wire from inside car? where to connect
Are you using the truck fuse box? You can connect the starter wire directly to the starter from your original engine harness, or you can connect it to the large purple wire on the LSx harness that goes to the starter.
Old 07-09-2007, 10:28 PM
  #10  
Launching!
Thread Starter
iTrader: (9)
 
1987earthquake's Avatar
 
Join Date: May 2007
Location: Hattiesburg, MS
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts

Default

I am using the truck fuse box. I had to cut it some to make it fit in the spot where the charcoal canister was but it looks good. Hopefully I can get my computer sent off in the next couple days so I can have it for the weekend. I'm looking to fire it up either this weekend or next weekend. Just depends on when I get my computer back. I deleted a lot of stuff from the harness. Hope this will solve my issues. I had some cables made today for my battery power to the fuse box and to the alternator. I made them long enough to stretch from the passenger side where the battery is to the driver side where the fuse box and alternator is. Now I need to find a transmission so I will be able to drive it.
Old 07-09-2007, 10:32 PM
  #11  
Launching!
Thread Starter
iTrader: (9)
 
1987earthquake's Avatar
 
Join Date: May 2007
Location: Hattiesburg, MS
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts

Default

When you say mil light are you talking about the ses light in the dash? or is this light separate?
Old 07-09-2007, 10:35 PM
  #12  
sawzall wielding director
iTrader: (4)
 
G-Body's Avatar
 
Join Date: Sep 2004
Location: Downers Grove, IL
Posts: 3,120
Received 8 Likes on 8 Posts

Default

Originally Posted by 1987earthquake
When you say mil light are you talking about the ses light in the dash? or is this light separate?
yep, that light has too many abbreviations/names....MIL(Malfunction indicator lamp) = SES = check engine = ....... Sorry about saying MIL and adding to the confusion.

I posted the info about hooking up the IGN wire in your other thread, thats where I remembered that you were using a truck harness.
Old 07-09-2007, 11:14 PM
  #13  
TECH Apprentice
 
eagleuh1's Avatar
 
Join Date: Aug 2005
Location: Dover Arkansas
Posts: 347
Likes: 0
Received 0 Likes on 0 Posts
Default

I have the info for a 2005 5.3 from a suburban. What year is yours? Are you using the fly by wire. I connected my ignition switch output(ignition on) wire at pin A9 on the grayconnector (C1) of the underhood fuse box. This should trip the ignition relay. Make sure you get Battery+ power to your junction block or whatever sends power to the ignition switch though. There also will be a problem with power to the transmission if using the 4l60e. You have to get power to its circuit which is pin E11 on C2. I did this on mine by running a wire from pin A7 connector C1( the gray one) to pin C9 on connector C1. That gives ignition power to tranny. Good luck.These pins are different for other years.
Old 07-10-2007, 07:47 AM
  #14  
Launching!
Thread Starter
iTrader: (9)
 
1987earthquake's Avatar
 
Join Date: May 2007
Location: Hattiesburg, MS
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts

Default

eagleuh1 I have a 1999. Will I need to power up my tranny on this one like that as well? I thought the trans would be powered though already. I'm glad I found out now rather than later when I couldn't shift my trans. Could anyone verify the way I could hook up my trans power. Is E11 on C2(black connector?) the same for 1999 and 2005? If not where would I power it up at?
Old 07-10-2007, 11:29 PM
  #15  
TECH Apprentice
 
eagleuh1's Avatar
 
Join Date: Aug 2005
Location: Dover Arkansas
Posts: 347
Likes: 0
Received 0 Likes on 0 Posts
Default

I doulbt they'll be the same pinouts. For some reason they send power from the inside fuse box on 2005 to the UFB to power the tranny circuit. Jeepin Pete pointed this out to me. My pinouts were different than his and his was like 2003 5.3. Pin E11 on C2(black connector on UFB) is circuit 1020. I powered it with an ignition on source wire I wasn't using on my fuse box. I highly recommend getting an account with ALLDATA.com for wiring schematics, connector views and pinouts for your engine vehicle and recipient vehicle. I sat down and looked all my wiring and basicly figured a lot out with help from members as well. Good luck.



Quick Reply: wiring questions on truck harness



All times are GMT -5. The time now is 04:36 AM.