AE86 engine harness help ..

[jondee86]

When I modified the AE92 loom for use in my early model AE86,
there was no provision in the engine loom for the bulkhead plug. All
the wires went back towards the ECU in a single loom. I had to
intercept the relevant p/s and sensor wires, and splice them to a
spare bulkhead plug I scavenged off an AE85. This way my modded
loom finished up looking pretty much like the original AE86 loom.

I would have to go and have a look to be sure, but from memory
there are three mult-pin plugs that plug into the ECU. Two are from
the engine loom, and one is from the body loom. And I think there
was a fourth plug that connected to a socket beside the ECU.

It is unlikely that any of the wires previously included in the bulkhead
plug will pass thru the ECU. But it is possible that they will transfer
from the body or dashboard loom to the engine loom via a separate
socket near the ECU. This arrangement allows the engine loom to be
unplugged and removed with the engine.

So, if you are able to identify and trace the switched power supplies
(from the key switch) and sensor inputs, there is no reason why you
can't make a separate loom just for those wires.

Cheers... jondee86