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88 V6 engine compartment wire harness/loom HELP :) by ALJR
Started on: 07-15-2009 10:00 AM
Replies: 15
Last post by: Robert 2 on 07-17-2009 05:39 PM
ALJR
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Report this Post07-15-2009 10:00 AM Click Here to See the Profile for ALJRClick Here to Email ALJRSend a Private Message to ALJRDirect Link to This Post

Uhhhh Ohhhh...

Its been a while (over 10 years) since I started this project and I am now finally in the home stretch with my baby. However, I forget the proper roughting of the engine wire harness. It is the harness that exits the back side of the ECM; the left plug if facing it. As you can see from the pic below, I left the harness attached to the chassis/ECM and disconnected everything else on the engine. The harness leads tot he left, where it is attached tot he fire wall. A smaller loom exits off and leads behind the air box to the relays.

The remaining harness rorughting is where I need HELP
There is also a metal bracket on the loom (also pictured below) that secures somewhere?? I assume to prevent it from making contact with something it shouldn't..
Also, if anyone could help with the proper ground locations?

My baby is an 88gt 3.1L auto converted to 5spd.

Thanks,
AL


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ALJR
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Report this Post07-15-2009 03:28 PM Click Here to See the Profile for ALJRClick Here to Email ALJRSend a Private Message to ALJRDirect Link to This Post

19 views and no one can help me

I have read through some of the other posts and a bunch of you guys know these cars inside and out...

Please help if you can! I don't want my newly rebuilt motor going up in flames because I ran the harness wrong...

ANY help would be usefull

Thanks,
AL

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jaskispyder
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Report this Post07-15-2009 03:47 PM Click Here to See the Profile for jaskispyderSend a Private Message to jaskispyderDirect Link to This Post

Passenger side of the engine... connects to one of the three bolts that go to the front heat.... where the upper A/C bracket mounts. I believe it is the lower, rear bolt, but I can't remember. I just installed my last weekend, but I can't remember exactly. I believe... yes.. the bolt had a stud on the head and another nut screwed to the top. This bracket is bolted down by the stud/nut.

Hope that helps

J.

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ALJR
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Report this Post07-15-2009 05:08 PM Click Here to See the Profile for ALJRClick Here to Email ALJRSend a Private Message to ALJRDirect Link to This Post

 
quote
Originally posted by jaskispyder:

Passenger side of the engine... connects to one of the three bolts that go to the front heat.... where the upper A/C bracket mounts. I believe it is the lower, rear bolt, but I can't remember. I just installed my last weekend, but I can't remember exactly. I believe... yes.. the bolt had a stud on the head and another nut screwed to the top. This bracket is bolted down by the stud/nut.

Hope that helps

J.


Thanks J!

In the below pic, is that the bracket & bolt you were refering to? I assume the harness stays as close as possible against the rear firewall behind the heat shield?
Also, there is a braided grond strap attached to the right deck lid bracket. Do you remember where it grounds to?

Thanks again,
AL

[This message has been edited by ALJR (edited 07-15-2009).]

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sjmaye
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Report this Post07-17-2009 04:43 AM Click Here to See the Profile for sjmayeSend a Private Message to sjmayeDirect Link to This Post

OK, I was confused at first, but I think I see what you did now. You did not remove the harness with the engine. You disconnected everything from the engine before pulling and reinstalled the engine before connecting everything. Most people pull the engine with the main harness ( I call the umbilical) still connected to the engine.

I am going by memory here so bear with me. First thing, the rough routing of the harness is this


You should have a metal loop mount on the fire wall as the harness leaves the ECM


This guides the harness toward the air cleaner where it will connect a sensor or two on the air cleaner as well as a couple relays mounted on the firewall.




After that it heads toward the "front" of the engine (side nearest the firewall). Here is the general routing



A close up of the harness mount coming off a trans mount bolt near the coolant crossover pipe


At about this point there are a couple ground leads running to a couple bolts on the head


Here is an overall shot with another mount and connections


Another shot as it heads up behind the ac compressor


You can here see it heading up toward the water neck.



NOW ON THE TRUNK SIDE

Here is the general routing on the side nearest the trunk.


Here is as the harness heads down from the water neck area down behind the alternator bracket


Here is behind the alternator


This photo more clearly shows the wiring sliding behind the alternator bracket


Here is a harness support just behind the alternator



Here is the harness mount on one of the trans mounting bolts as the harness goes to the auto transmission.



As for the harness bracket you are holding. It looks like one of the ones that mounts to a transmission mounting bolt, but I would know better if I knew about where it was on the harness.

I don't envy you. Getting the harness in after the engine is installed will be like threading a needle with your wire harness.


Good Luck.

Steve

[This message has been edited by sjmaye (edited 07-17-2009).]

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Nosferatu187
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Report this Post07-17-2009 07:06 AM Click Here to See the Profile for Nosferatu187Send a Private Message to Nosferatu187Direct Link to This Post

Wow, excellent job sjmaye!

Here's the location of that mystery bracket:


The braided ground strap and negative battery cable bolts to the engine here:



Mike

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Bloozberry
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Report this Post07-17-2009 08:13 AM Click Here to See the Profile for BloozberrySend a Private Message to BloozberryDirect Link to This Post

Hey sjmaye, lots of work and time to take and edit those pictures there. Even though I didn't need the info, I give you a well deserved "+" for the effort to help others out.

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Pyrthian
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Report this Post07-17-2009 08:20 AM Click Here to See the Profile for PyrthianClick Here to Email PyrthianSend a Private Message to PyrthianDirect Link to This Post

the service manual pics do show the wiring routing
and also the brackets & things

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Robert 2
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Report this Post07-17-2009 09:34 AM Click Here to See the Profile for Robert 2Send a Private Message to Robert 2Direct Link to This Post

Real good explanations

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ALJR
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Report this Post07-17-2009 12:56 PM Click Here to See the Profile for ALJRClick Here to Email ALJRSend a Private Message to ALJRDirect Link to This Post

sjmaye, YOU DA MAN!

Thank you Thank you Thank you Thank you. You do not realise how much I appreciate it! I was just out in my shop scratching my head. I had an Idea on the "general" path, but the "proper" path, mounting locations AND termination points is invaluable

Thanks again,
AL

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ALJR
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Report this Post07-17-2009 12:57 PM Click Here to See the Profile for ALJRClick Here to Email ALJRSend a Private Message to ALJRDirect Link to This Post

 
quote
Originally posted by Pyrthian:

the service manual pics do show the wiring routing
and also the brackets & things


Factory service manual for the 88 is about $90

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Pyrthian
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Report this Post07-17-2009 01:45 PM Click Here to See the Profile for PyrthianClick Here to Email PyrthianSend a Private Message to PyrthianDirect Link to This Post

 
quote
Originally posted by ALJR:
Factory service manual for the 88 is about $90


yes - but there are also online versions somewhere - and it would be mighty helpful to print out them diagrams
or, if someone has one, maybe they can post them pics.

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Robert 2
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Report this Post07-17-2009 02:02 PM Click Here to See the Profile for Robert 2Send a Private Message to Robert 2Direct Link to This Post

But the workshop doesn't describe as good a these images .

[This message has been edited by Robert 2 (edited 07-17-2009).]

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ALJR
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Report this Post07-17-2009 02:43 PM Click Here to See the Profile for ALJRClick Here to Email ALJRSend a Private Message to ALJRDirect Link to This Post

 
quote
Originally posted by Robert 2:

But the workshop doesn't describe as good a these images .


Amen to that!

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CarverToo
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Report this Post07-17-2009 04:18 PM Click Here to See the Profile for CarverTooClick Here to Email CarverTooSend a Private Message to CarverTooDirect Link to This Post

 
quote
Originally posted by Nosferatu187:

Wow, excellent job sjmaye!

Here's the location of that mystery bracket:


The braided ground strap and negative battery cable bolts to the engine here:



Mike

Hey Mike - That water pump has my interest. Will it fit the 1986 2.8?

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Robert 2
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Report this Post07-17-2009 05:39 PM Click Here to See the Profile for Robert 2Send a Private Message to Robert 2Direct Link to This Post

 
quote
Originally posted by ALJR:


Amen to that!


When i did mine i had the 1988 workshop manual , the Haynes and the Mitchell , but what helped me most were the pics from i think Dodgerunner in Photobucket .

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