That plug has 2 wires.

One wire carries all of the electricity used by the fuel injection system.

The other wire comes from the starter motor circuit 50 to let the fuel
injection know when the starter is supposed to be cranking.

Mark

Dan N wrote:
> hi all,
>
> I have this question concerning my van and my son's van, 1990 tintop
> Syncro, 1988 2WD GL, both with 2.1 WBX, and this happened on both vans a
> year apart.
>
> after a long drive, making a fuel stop, the van won't start, it cranks
> fine. So we went thru the process of checking fuel pump, ignition switch,
> AFM connector, Hall sensor, plugs etc etc... no start..
>
> but then out of the blue I remove and replug the small connector (the one
> on the right of the big wiring loom) on the black box that sits on top of
> the coil.. once I replug it the engine starts right up as if nothing ever
> happened...
>
> so the question is:
>
> - what's the function of that small plug?
> - where it connected to?
>
> thanks
>
> dan
>