New Member RX-7 Technical Post your first technical questions here, in an easy flame free environment, before jumping into the main technical sections.

Wiring Harness Pointers?

Thread Tools
 
Search this Thread
 
Old 08-10-12 | 03:13 PM
  #1  
Blackned Turbo II's Avatar
Thread Starter
Junior Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 40
Likes: 0
From: Ohio
OH Wiring Harness Pointers?

I have been looking at photos day and night trying find out where these wires go to they sprout off the wiring harness the owner before robbed parts and cut wires as of now im not getting any power to dash or anything so i hope these cut wires are the reason why
Attached Thumbnails Wiring Harness Pointers?-img_2459-1-.jpg   Wiring Harness Pointers?-img_2462-1-.jpg   Wiring Harness Pointers?-024.jpg  
Old 08-10-12 | 08:08 PM
  #2  
RotaryRocket88's Avatar
Top Down, Boost Up

iTrader: (7)
 
Joined: Mar 2008
Posts: 8,718
Likes: 6
From: San Diego, CA
The chopped off wires appear to be the + leads that run from the positive battery terminal (and potentially the alternator B-post) to the fuse block. They would have ring terminals on the end, and go to the side of the main fuse facing the front of the car. If there's no power to the fuse block, nothing will work.

I would suggest tracing these wires before connecting them to anything. Put a multimeter on the + battery cable and check for continuity with the 2 hacked off wires. You might also just consider a replacement harness.
Old 08-10-12 | 08:38 PM
  #3  
misterstyx69's Avatar
Retired Moderator, RIP
iTrader: (142)
 
Joined: Sep 2005
Posts: 25,581
Likes: 133
From: Smiths Falls.(near Ottawa!.Mapquest IT!)
I see the problem.
The wires are for Battery + and the alternator...you don't have any power at all as the battery is not feeding anything,
Strip the harness and redo it.
What is the big red wire for(or is that a hose above the strut tower)???

Last edited by misterstyx69; 08-10-12 at 08:42 PM.
Old 08-11-12 | 06:07 PM
  #4  
Blackned Turbo II's Avatar
Thread Starter
Junior Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 40
Likes: 0
From: Ohio
Alright would i have to buy a whole new harness??, and i tested the wires its deffinalty getting some juice, and the big red wire was for an amp

Last edited by Blackned Turbo II; 08-11-12 at 06:35 PM. Reason: had mismatch letters that I didnt want
Old 08-11-12 | 08:50 PM
  #5  
RotaryRocket88's Avatar
Top Down, Boost Up

iTrader: (7)
 
Joined: Mar 2008
Posts: 8,718
Likes: 6
From: San Diego, CA
The harness on that side of the bay is small, and called the engine (E) harness. This is not to be confused with the engine management (EM) harness, which connects all of the sensors to the ECU. The engine harness has connections for the battery, CAS, starter and transmission switches.
Old 08-11-12 | 08:56 PM
  #6  
misterstyx69's Avatar
Retired Moderator, RIP
iTrader: (142)
 
Joined: Sep 2005
Posts: 25,581
Likes: 133
From: Smiths Falls.(near Ottawa!.Mapquest IT!)
as long as you have the CAS hooked and Trans switches,oil sender hooked up,the rest is power wires.
Your main power goes off the battery splits and goes to alternator and the fuse block..
Off the fuse block(80 amp fuse,other side) it goes to the starter.
In my opinion you do not need to replace the harness.You need to get power to the alternator and fuse block.
That is from what I can gather in your pics.
This is why I say strip the harness down.That harness is a "subharness" of the Big *** EM harness.It is not really complicated at all.I just re-did mine as I hated what it looked like,all covered in Gunk and oil residue,so I can give you pointers as to where stuff goes.
Old 08-11-12 | 09:29 PM
  #7  
Blackned Turbo II's Avatar
Thread Starter
Junior Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 40
Likes: 0
From: Ohio
Alright you are a bigg help hopefully this will get me started on getting it running
where might i find the e harness?, what i understand is you can replace just the section that is cut?
Old 08-11-12 | 10:46 PM
  #8  
misterstyx69's Avatar
Retired Moderator, RIP
iTrader: (142)
 
Joined: Sep 2005
Posts: 25,581
Likes: 133
From: Smiths Falls.(near Ottawa!.Mapquest IT!)
Originally Posted by Blackned Turbo II
Alright you are a bigg help hopefully this will get me started on getting it running
where might i find the e harness?, what i understand is you can replace just the section that is cut?
It is the harness that is CUT!
Peel back that harness that is cut..Get the wrapping off of it.That is the ONLY way you are gonna find out the damage.
Get dirty!( it's gonna be gooey...)
Old 08-19-12 | 07:54 PM
  #9  
Blackned Turbo II's Avatar
Thread Starter
Junior Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 40
Likes: 0
From: Ohio
alright so i got the wire pretty much off but it goes down the starter and then i couldn't reach and an get it off im wondering can i just replace the cut part before i take the whole e harness off cause the only thing that is stopping me right now is i cant get it off the starter
Old 08-19-12 | 08:23 PM
  #10  
misterstyx69's Avatar
Retired Moderator, RIP
iTrader: (142)
 
Joined: Sep 2005
Posts: 25,581
Likes: 133
From: Smiths Falls.(near Ottawa!.Mapquest IT!)
If you see that the wire is NOT cut to the starter then Yes you can stop unwrapping it.
The point I am getting at is IF the wire is already Cut,and it is 20 years old,isn't it time for some GOOD wire to take it's place?
If you put a splice in a 20 year old wire then you are just asking for crap to happen down the road.
Case and point: I had trouble with the battery losing juice quickly when starting.I replace Just that harness that you are working on,and I can crank for a good half hour now..
Old 08-21-12 | 03:25 PM
  #11  
Blackned Turbo II's Avatar
Thread Starter
Junior Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 40
Likes: 0
From: Ohio
where would i find this harness i cant go to the junk yards cause they are all apart and only have 1st gen older rx7's??
Old 08-21-12 | 06:43 PM
  #12  
misterstyx69's Avatar
Retired Moderator, RIP
iTrader: (142)
 
Joined: Sep 2005
Posts: 25,581
Likes: 133
From: Smiths Falls.(near Ottawa!.Mapquest IT!)
The wire attaches to the starter by a 12mm nut,so that shouldn't be a problem to get off.
If you can send me pics (misterstyx69@hotmail.com) I can tell you where to hook up the wires.
If your battery is still up front(not relocated) then the wiring is simple.
Old 08-21-12 | 08:55 PM
  #13  
Blackned Turbo II's Avatar
Thread Starter
Junior Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 40
Likes: 0
From: Ohio
its up front still. and does anybody have a picture of what a non cut harness looks like?
Old 09-04-12 | 11:27 PM
  #14  
DC5Daniel's Avatar
Rotary Freak
iTrader: (10)
 
Joined: Jul 2012
Posts: 1,631
Likes: 87
From: Peachtree City, GA
The only thing (from the picture) that your missing is the terminal. As Misterstyx69 said, all you need to do is replace that to get it going. Point being, if that 12" of wire with the terminal weren't cut off you'd be in business. However, the fact that it's damaged and old and a repair job will be shoddy at best, replacement is the best course of action.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
gxl90rx7
Haltech Forum
4
09-14-15 03:09 PM



Quick Reply: Wiring Harness Pointers?



All times are GMT -5. The time now is 08:21 AM.