Any idea how I melted this plug?

[SmogSUX]

Long story short, I used the sohc interior harness, but a dohc chasis, lower, and engine harness on my 89 with a dohc swap. Was pretty sure I had everything wired up correctly...I did what people said with the ecu simply matching the like wires and soldering them on the dohc ecu clip.

Anyways I know I have fuel (smelled it), but when I went to start the car I saw smoke and found this:

Seen here after I cut the melted stuff off:

It's a plug that's taped down to the harness right before the ignition coil...^Here's a picture of it on my buddy's dohc s13. It's the plug you see taped down. It's right by the Power steering reservoir...right before the ignition coil on the harness.

Well I figured I'd just leave those wires cut like that so they wouldn't ground out or whatever the hell happened that made them melt like that and I wasn't getting spark.

So I'm thinking I needed that plug or who knows..it might be something else?

Anyways the question is this:

What is the plug for? (I looked on the FSM wiring diagram and didn't see it...

And do I need a whole new engine harness? I'm sure getting this plug from the stealership would cost about as much as a used harness. Anyways! any ideas??

[corn322]

If that's the plug I'm thinking of it contains a resistor and a capacitor. Something to do with the ignition, hold on... yeah, that's what it is. Give me a bit and I'll post were it is in the wiring diagram.

[corn322]

It's in the foldout section. On the first diagram at the bottom. Between the coolant temp sensor and the power transistor.

So yes, you do need that plug. But I don't know why it destroyed itself.

[SmogSUX]

Gah...that sucks. Guess I'll get another harness...just hope I don't melt the plug on that one or I'll be out like $40