Removing the engine bay wiring harness
Thread Starter
Instructor
Joined: Sep 2000
Posts: 229
Likes: 3
From: NJ
Removing the engine bay wiring harness
I am in the process of removing the stock wiring harness from the engine bay of a '90 convertible. I have removed all of the connections on the passenger side of the engine.
Here is where I'm having issues:
1) 5-wires going back to the transmission through the transmission tunnel. Where is this connector located?
2) Drivers side bulkhead where wires enter the cabin. Do those come apart like the main harness detached on the passenger side?
Once I have the harness out, I am going to try and integrate wires and connectors from the FAST harness so I don't have extra wires and connectors everywhere.
Any information or advise would be greatly appreciated.
Thanks,
=JRW
Here is where I'm having issues:
1) 5-wires going back to the transmission through the transmission tunnel. Where is this connector located?
2) Drivers side bulkhead where wires enter the cabin. Do those come apart like the main harness detached on the passenger side?
Once I have the harness out, I am going to try and integrate wires and connectors from the FAST harness so I don't have extra wires and connectors everywhere.
Any information or advise would be greatly appreciated.
Thanks,
=JRW
Burning Brakes
Joined: Apr 2009
Posts: 1,228
Likes: 10
From: That one city...you know that one. Idaho
With the drivers side bulkhead connector there is a bolt in the center of the connector that is part of the connector. Hopefully someone who can explain how it is removed better will post.
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
Once you get that bulkhead out most of the wires loop back out to the engine bay. Its sticky and messy. Good lucl
So today I finally tackled the Wiring bulkhead. The plan was pull the wires I didn't need out of the bulkhead and drop them inside the car. Later when I redo the interior I was going to follow them inside and unpin. I had already cut the wires I dint need short to make the process easier.
I took the bulkhead apart separated the wires into keeping and deleting. I then started to pull the out of the wire separator that clips in the bulkhead. That's when I noticed allot of the wires had a twin. I remember thinking when I was cutting the wires I dint need out "why would all the sensor wires run inside when the ECM is in the engine compartment". I decided to get my meeter out and ck them.
I learned a lesson today, I could have kept my TPI harness intact and maybe sold it. Out of the 50 or so wires in the bulkhead that come from the ECM 30 are pairs that run in from the ECM go about 5" then loop back out of the bulkhead back into the engine compartment. When I was done only 4 wires went into the engine compartment that I didn't need. I put heat shrink on the ends and tucked them in the harness.
Here is a picture of some of the wires that loop back. You can see the sticky crap they seal the bulkhead with about half way.
I took the bulkhead apart separated the wires into keeping and deleting. I then started to pull the out of the wire separator that clips in the bulkhead. That's when I noticed allot of the wires had a twin. I remember thinking when I was cutting the wires I dint need out "why would all the sensor wires run inside when the ECM is in the engine compartment". I decided to get my meeter out and ck them.
I learned a lesson today, I could have kept my TPI harness intact and maybe sold it. Out of the 50 or so wires in the bulkhead that come from the ECM 30 are pairs that run in from the ECM go about 5" then loop back out of the bulkhead back into the engine compartment. When I was done only 4 wires went into the engine compartment that I didn't need. I put heat shrink on the ends and tucked them in the harness.
Here is a picture of some of the wires that loop back. You can see the sticky crap they seal the bulkhead with about half way.
