95 vs 96 pcm

[Ken Kelly]

Mike,
	I spent an hour in a 95 Caprice cop car looking for it, and
came to the conclusion that someone beat me to it. 

	Do you have the whole car?  I was told that it is a small
box in the center area of the dash, it plugs into the dash
wiring harness. Unless you are kept all the dash wiring, I
would think you don't have it. In the normal car the Key
pellet is a resistor. it comes down the column in and orange
cable with two small gauge wires in it. this feeds the
resistor value to the Body computer, and the body computer
generates the 50 Hz square wave if the pellet resistance
matches a stored value. I assume the Cop car uses a modified
Body computer, or an Adjunct to the body computer for this.
I was looking for one about 18 months ago, I built my own
555 timer, and never looked again, so I don't remember
exactly what it was supposed to look like.

	I do have an 8051 that I took from a 95 Black and white, I
can verify that the VAT is enabled in this PCM if you want.

		Ken

Mike wrote:
> 
> >
> >
> >
> > All factory 8051's seem to have VATS enabled. In some police
> > models they had no Key pellet, and used a seperate module
> > under the dash to generate the 50 Hz signal to the PCM. You
> > must either use a 555 to generate a 50 Hz squarewave or
> > disable VATS in the PCM.
> >
> >               Ken
> >
> >
> So i must have the module your talking about . You know what it looks like?
> I guess ill be able to trace it douwn with my helm manual.
> Whats the serial # for the 96 pcm's? All 94-95 lt1 pcm's are 8051?
> 
> Thanks
> 
> Mike