Chassis harness

[Mark69bird]

It is not recommended to use an external return fuel system with any modern fuel module. They can pump themselves dry, and that's not a good thing.

Nobody makes an engine harness that will seamlessly integrate into the chassis/interior harness of the car. Nor do the early f-body firewall bulkheads have enough extra cavities to accommodate all that is needed for engine monitoring, data bus, etc. Though not something that presses the EASY button, here's what I did:

1) Get an AAW Classic update kit.

2) Order from AAW an interior side and the two firewall side bulkhead plugs for a second gen f-body. The second-gen bulkhead has enough cavities for lots of extra circuits. Also order up a whole bunch of new terminals that can be used to put in new wires. Several good quality crimpers will be needed.



3) Layout the second-gen firewall bulkhead harnesses so that one side carries the engine/ecm data and other circuits that support the engine. This makes the engine harness removeable. Make the other bulkhead for lighting, wiper motor, etc.

4) Swap over the interior side bulkhead plug based on how the wiring is placed on the firewall side. There is no hard copy guide for this, just common sense. Triple check your work as it's no fun to fix a blinking dome light.

5) Add additional circuits to the interior side bulkhead that align to the fire wall side plugs. Route where needed.

A through knowledge of the ECM/engine wiring will be needed along with making your own wiring diagram of the bulkheads.

Do you have some part numbers?
You saying to get the 2nd gen wire harness? Just want to make sure I’m reading this right and following correctly.
I know it’s not a simple quick connect and go. I figure the engine harness would be a standalone.
Thanks