Re: [ST] schematic help

["Neil Lindsey" <neil@xxxxxxxxxxx>]

- ----- Original Message -----
From: "Paul Fox" <pgf@xxxxxxxxxxxxxxxxxxxx>

> the connector has three wires:  middle is black, and is ground.  purple
> is 12V hot, all the time.  the third is green with a red tracer, and
> i _think_ this is switched to ground by the ignition -- i.e. it's ground
> when the ignition is on, and floating otherwise.  (i'm typing this from
> memory -- i _might_ have the colors of the purple and green/red wires
> reversed in my head, but the functions are right.)  can someone tell
> me if this is all correct?
>

Purple is hot all the time -- connected to Fuse #3 if you're interested

Black is ground -- hardwired

Green w/Red tracer is connected to pin #5 of the instruments connector, pins
#1 and #3 of the alarm connector, pin #2 of the fuel pump, the "2/E1" pin of
the ECU, and to one end of a 1.2K ohm resistor whose other end is connected
to the "1/A4" pin of the ECU.  The manner in which this signal is switched
to ground (assuming that you are correct in your findings) is not exactly
depicted on the schematic, but I think it's safe to say that the status of
the signal on this wire is under the direct control of the ECU.

HTH
Neil



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