Diacom cable for GM

[Terryk]

Wrong....

----------
> From: George Hoefer <ghoefer at mail.ibl.bm>
> To: diy_efi at coulomb.eng.ohio-state.edu
> Subject: Re: Diacom cable for GM
> Date: Monday, October 13, 1997 4:10 PM
> 
> To Steve and the List,
>         I to have the Diacom plus software and I believe the red wire on
the
> cable is needed when the car can not supply power for the serial to
parallel
> converter circuit that is built into the molded connector. The car link
is a
> serial signal type, and the PC computer end of the cable connects to the
> parallel port on the computer. On some years of GM cars the power was not
> available at the ALDL plug so Diacom made their cable flexible enough to
> adapt to all conditions. Hope this helps.
> 
> Regards,
> 
> 
> 
> 
> At 09:02 AM 10/13/97 -0500, you wrote:
> >I purchased the Diacom diagnostic interface (GM) kit back in '92. It
> >runs under DOS and has been worth the $200 or so I spent on it.
> >The supplied cable, which connects your RS232 to the ECU (ALDL) has a
> >red wire for 12VDC input. Recently I discovered the system works with,
> >or without the 12VDC connected. I had always assumed there were active
> >components molded into one of the connectors; now I am wondering if its
> >really just a hunk of wire, with connectors on each end. Anyone know?
> >Steve
> >
> George Hoefer
> 1966 and 1990 Corvetttes
>